Emerge {5}{W} (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's mana value.)

When Adipose Offspring enters the battlefield, create a 2/2 white Alien creature token. If Adipose Offspring's emerge cost was paid, instead create X of those tokens, where X is the sacrificed creature's toughness.

Whenever you cast a spell, you gain 1 life for each spell you've cast this turn.

Pay 50 life: Aetherflux Reservoir deals 50 damage to any target.

{T}: Add {W}.

{T}: Add {C}{C}. Ancient Tomb deals 2 damage to you.

Enchant land

Enchanted land has "{T}, Sacrifice a creature: You gain life equal to the sacrificed creature's toughness."

Flash

Whenever an opponent searches their library, you gain 1 life and draw a card.

{T}, Pay 1 life, Sacrifice Arid Mesa: Search your library for a Mountain or Plains card, put it onto the battlefield, then shuffle.

{2}{W}, {T}, Discard a card: Exile target attacking creature. Its controller gains life equal to its toughness.

Vigilance

Whenever an opponent casts a spell, if no mana was spent to cast it, counter that spell.

Sacrifice Boromir, Warden of the Tower: Creatures you control gain indestructible until end of turn. The Ring tempts you.

Enchant creature

Enchanted creature can't attack or block.

Flash

{1}, Sacrifice Cathar Commando: Destroy target artifact or enchantment.

Sacrifice Children of Korlis: You gain life equal to the life you've lost this turn. (Damage causes loss of life.)

Imprint -- When Chrome Mox enters the battlefield, you may exile a nonartifact, nonland card from your hand.

{T}: Add one mana of any of the exiled card's colors.

Put target attacking creature on the bottom of its owner's library. Its controller gains life equal to its toughness.

Indestructible

{T}: Add {C}.

Whenever a Cleric creature you control becomes the target of a spell or ability, it gets +0/+2 until end of turn.

Dawn of a New Age enters the battlefield with a hope counter on it for each creature you control.

At the beginning of your end step, remove a hope counter from Dawn of a New Age. If you do, draw a card. Then if Dawn of a New Age has no hope counters on it, sacrifice it and you gain 4 life.

Flash

Mold Earth -- Whenever one or more lands enter the battlefield under an opponent's control without being played, you may search your library for a Plains card, put it onto the battlefield tapped, then shuffle. Do this only once each turn.

Flying

{4}, {T}: Search your library for a Rebel permanent card with mana value 3 or less, put it onto the battlefield, then shuffle.

When Defiant Vanguard blocks, at end of combat, destroy it and all creatures it blocked this turn.

{5}, {T}: Search your library for a Rebel permanent card with mana value 4 or less, put it onto the battlefield, then shuffle.

{W}, {T}: Target permanent you control gains protection from instant spells and from sorcery spells until end of turn.

Emeria, the Sky Ruin enters the battlefield tapped.

At the beginning of your upkeep, if you control seven or more Plains, you may return target creature card from your graveyard to the battlefield.

{T}: Add {W}.

Search your library for an artifact or enchantment card, reveal it, then shuffle and put that card on top.

Whenever an opponent casts their first noncreature spell each turn, draw a card unless that player pays {X}, where X is Esper Sentinel's power.

Exile target nonland permanent. Its controller incubates X, where X is its mana value. (They create an Incubator token with X +1/+1 counters on it and "{2}: Transform this artifact." It transforms into a 0/0 Phyrexian artifact creature.)

{2}, {T}, Sacrifice Expedition Map: Search your library for a land card, reveal it, put it into your hand, then shuffle.

If you control a commander, you may cast this spell without paying its mana cost.

Creatures you control gain indestructible until end of turn.

If Gemstone Caverns is in your opening hand and you're not the starting player, you may begin the game with Gemstone Caverns on the battlefield with a luck counter on it. If you do, exile a card from your hand.

{T}: Add {C}. If Gemstone Caverns has a luck counter on it, instead add one mana of any color.

Destroy target permanent. Its controller creates a 3/3 green Elephant creature token.

{T}: Another target creature you control gains protection from colorless or from the color of your choice until end of turn.

During your turn, your opponents can't cast spells or activate abilities of artifacts, creatures, or enchantments.

Flying

Sacrifice Hope of Ghirapur: Until your next turn, target player who was dealt combat damage by Hope of Ghirapur this turn can't cast noncreature spells.

At the beginning of your upkeep, if you control three or more artifacts, you gain 1 life.

{T}: Add {C}.

{4}, {T}, Sacrifice Inventors' Fair: Search your library for an artifact card, reveal it, put it into your hand, then shuffle. Activate only if you control three or more artifacts.

Kabira Takedown deals damage equal to the number of creatures you control to target creature or planeswalker.

Kabira Plateau enters the battlefield tapped.

{T}: Add {W}.

At the beginning of your upkeep, if an opponent controls more lands than you, you may search your library for up to three basic land cards, reveal them, put them into your hand, then shuffle.

{T}, Sacrifice Lawbringer: Exile target red creature.

{T}, Sacrifice Lightbringer: Exile target black creature.

Equipped creature has haste and shroud. (It can't be the target of spells or abilities.)

Equip {0}

Vigilance

When Loran of the Third Path enters, destroy up to one target artifact or enchantment.

{T}: You and target opponent each draw a card.

{1}, {T}: Untap target creature that has an activated ability with {T} in its cost.

At the beginning of your upkeep, flip a coin. If you lose the flip, Mana Crypt deals 3 damage to you.

{T}: Add {C}{C}.

{T}, Pay 1 life, Sacrifice Marsh Flats: Search your library for a Plains or Swamp card, put it onto the battlefield, then shuffle.

{T}: Add {C}.

{3}, {T}, Sacrifice a creature: You gain life equal to the sacrificed creature's toughness.

Changeling (This card is every creature type.)

{X}: Until end of turn, creatures you control have base power and toughness X/X and gain all creature types.

({T}: Add {W}.)

Mistveil Plains enters the battlefield tapped.

{W}, {T}: Put target card from your graveyard on the bottom of your library. Activate only if you control two or more white permanents.

{T}: Target creature you control gains protection from the color of your choice until end of turn.

{0}: The next 1 damage that would be dealt to Nomads en-Kor this turn is dealt to target creature you control instead.

{T}: Add {C}.

{2}, {T}: Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)

At the beginning of each player's upkeep, that player chooses target player who controls more lands than they do and is their opponent. The first player may search their library for a basic land card, put that card onto the battlefield, then shuffle.

Magical Tinkering -- {W}, {T}, Sacrifice an artifact: Search your library for an artifact card with mana value equal to 1 plus the sacrificed artifact's mana value, put it onto the battlefield, then shuffle. Activate only as a sorcery.

Flanking (Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.)

{0}: The next 1 damage that would be dealt to Outrider en-Kor this turn is dealt to target creature you control instead.

Equipped creature has "{T}: Add one mana of any color."

Equip {1}

Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

{2}, {T}, Sacrifice a creature: Search your library for a creature card that shares a creature type with the sacrificed creature and has mana value equal to 1 plus that creature's mana value. Put that card onto the battlefield, then shuffle. Activate only as a sorcery.

{4}, {T}: Search your library for a Rebel permanent card with mana value 3 or less, put it onto the battlefield, then shuffle.

{3}, {T}: Search your library for a Rebel permanent card with mana value 2 or less, put it onto the battlefield, then shuffle.

When Ranger-Captain of Eos enters the battlefield, you may search your library for a creature card with mana value 1 or less, reveal it, put it into your hand, then shuffle.

Sacrifice Ranger-Captain of Eos: Your opponents can't cast noncreature spells this turn.

When Recruiter of the Guard enters the battlefield, you may search your library for a creature card with toughness 2 or less, reveal it, put it into your hand, then shuffle.

{1}, {T}: Exile any number of cards from your hand face down. Put that many cards from the top of your library into your hand. Then look at the exiled cards and put them on top of your library in any order.

Secluded Steppe enters the battlefield tapped.

{T}: Add {W}.

Cycling {W} ({W}, Discard this card: Draw a card.)

Target creature you control gains protection from the color of your choice until end of turn.

Sejiri Glacier enters the battlefield tapped.

{T}: Add {W}.

Flying

Sacrifice Selfless Spirit: Creatures you control gain indestructible until end of turn.

{1}: Look at the top three cards of your library, then put them back in any order.

{T}: Draw a card, then put Sensei's Divining Top on top of its owner's library.

Toxic 1 (Players dealt combat damage by this creature also get a poison counter.)

Skrelv, Defector Mite can't block.

{W/P}, {T}: Choose a color. Another target creature you control gains toxic 1 and hexproof from that color until end of turn. It can't be blocked by creatures of that color this turn. ({W/P} can be paid with either {W} or 2 life.)

Equipped creature gets +1/-1.

Whenever equipped creature dies, draw two cards.

Equip {1}

When Skyclave Apparition enters, exile up to one target nonland, nontoken permanent you don't control with mana value 4 or less.

When Skyclave Apparition leaves the battlefield, the exiled card's owner creates an X/X blue Illusion creature token, where X is the mana value of the exiled card.

{T}: Add {C}{C}.

{T}, Tap an untapped creature you control: Add one mana of any color.

When Stoneforge Mystic enters the battlefield, you may search your library for an Equipment card, reveal it, put it into your hand, then shuffle.

{1}{W}, {T}: You may put an Equipment card from your hand onto the battlefield.

Destroy target nonland permanent. Its controller creates a 1/1 white Human creature token.

Exile target creature. Its controller gains life equal to its power.

Whenever Task Force becomes the target of a spell or ability, it gets +0/+3 until end of turn.

Until your next turn, your life total can't change and you gain protection from everything. All permanents you control phase out. (While they're phased out, they're treated as though they don't exist. They phase in before you untap during your untap step.)

Exile Teferi's Protection.

Indestructible

When The One Ring enters the battlefield, if you cast it, you gain protection from everything until your next turn.

At the beginning of your upkeep, you lose 1 life for each burden counter on The One Ring.

{T}: Put a burden counter on The One Ring, then draw a card for each burden counter on The One Ring.

You may activate abilities of creatures you control as though those creatures had haste.

{1}, {T}: Untap target creature.

Changeling (This card is every creature type.)

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I -- Urza's Saga gains "{T}: Add {C}."

II -- Urza's Saga gains "{2}, {T}: Create a 0/0 colorless Construct artifact creature token with 'This creature gets +1/+1 for each artifact you control.'"

III -- Search your library for an artifact card with mana cost {0} or {1}, put it onto the battlefield, then shuffle.

{W}, {T}: Search your library for a land card, reveal it, put it into your hand, then shuffle. Activate only if an opponent controls more lands than you.

{W}, {T}: Tap target creature.

Morph {W} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

Exile target creature you don't control. For each creature exiled this way, its controller searches their library for a basic land card. Those players put those cards onto the battlefield tapped, then shuffle.

Overload {4}{W}{W} (You may cast this spell for its overload cost. If you do, change its text by replacing all instances of "target" with "each.")

Buyback {2} (You may pay an additional {2} as you cast this spell. If you do, put this card into your hand as it resolves.)

As an additional cost to cast this spell, sacrifice a creature.

You gain life equal to the sacrificed creature's toughness.