Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Other creatures you control have trample.

Whenever an enchantment enters the battlefield under your control, create a 2/2 white Cat creature token. If that enchantment is an Aura, you may attach it to the token.

Flying

Whenever you cast an instant or sorcery spell, Aven Wind Mage gets +1/+1 until end of turn.

Azorius Chancery enters the battlefield tapped.

When Azorius Chancery enters the battlefield, return a land you control to its owner's hand.

{T}: Add {W}{U}.

Blossoming Sands enters the battlefield tapped.

When Blossoming Sands enters the battlefield, you gain 1 life.

{T}: Add {G} or {W}.

Draw three cards, then put two cards from your hand on top of your library in any order.

Enchant creature

Enchanted creature can't attack or block.

{1}{W}: Return Cage of Hands to its owner's hand.

Counter target spell.

Bestow {5}{W}{W} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)

Flying, first strike

Enchanted creature gets +4/+4 and has flying and first strike.

{1}, {T}, Sacrifice Chromatic Sphere: Add one mana of any color. Draw a card.

{T}: Add one mana of any color in your commander's color identity.

Counter target spell.

Flash

Creatures you control get +2/+2.

+2: Untap each enchanted permanent you control.

-1: Create a white Aura enchantment token named Mask attached to another target permanent. The token has enchant permanent and totem armor.

-7: Mill seven cards. Return all non-Aura enchantment cards from your graveyard to the battlefield, then do the same for Aura cards.

Estrid, the Masked can be your commander.

Enchant creature

As long as enchanted creature is green, it gets +1/+1 and has vigilance.

As long as enchanted creature is blue, it gets +1/+1 and has flying.

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

{T}: Add {C}.

{T}, Sacrifice Ghost Quarter: Destroy target land. Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle.

Bestow {5}{W} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)

Double strike (This creature deals both first-strike and regular combat damage.)

Enchanted creature gets +1/+1 and has double strike.

As long as it's your turn, Hardy Veteran gets +0/+2.

Put a +1/+1 counter on target creature you control. Then that creature fights target creature you don't control. (Each deals damage equal to its power to the other.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

When Jeskai Sage dies, draw a card.

Flying

Sacrifice Judge's Familiar: Counter target instant or sorcery spell unless its controller pays {1}.

Whenever a spell or ability an opponent controls destroys a noncreature permanent you control, you may destroy target permanent that opponent controls.

Enchant creature

Enchanted creature gets +2/+2.

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

Equip {0}

{T}: Add {G}.

Multikicker {1}{W} (You may pay an additional {1}{W} any number of times as you cast this spell.)

Creatures you control get +1/+1.

When Marshal's Anthem enters the battlefield, return up to X target creature cards from your graveyard to the battlefield, where X is the number of times Marshal's Anthem was kicked.

Whenever you cast an enchantment spell, you may draw a card.

New Benalia enters the battlefield tapped.

When New Benalia enters the battlefield, scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

{T}: Add {W}.

This spell can't be countered.

You have no maximum hand size.

Whenever an opponent casts a noncreature spell, draw a card.

Discard three cards: Exile Nezahal, Primal Tide. Return it to the battlefield tapped under its owner's control at the beginning of the next end step.

Enchant creature

Enchanted creature gets +3/+3.

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

Destroy target creature with flying.

Look at the top three cards of your library, then put them back in any order. You may shuffle.

Draw a card.

Seafloor Debris enters the battlefield tapped.

{T}: Add {U}.

{T}, Sacrifice Seafloor Debris: Add one mana of any color.

Sacrifice Seal of Cleansing: Destroy target artifact or enchantment.

Target player reveals their hand. You gain life equal to the number of cards in that player's hand.

Secluded Steppe enters the battlefield tapped.

{T}: Add {W}.

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

Vigilance, reach

({G/U} can be paid with either {G} or {U}.)

Enchant creature

When Shielding Plax enters the battlefield, draw a card.

Enchanted creature can't be the target of spells or abilities your opponents control.

Whenever you cast an enchantment spell, create a 4/4 white Angel creature token with flying.

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

Flying

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Heroic -- Whenever you cast a spell that targets Staunch-Hearted Warrior, put two +1/+1 counters on Staunch-Hearted Warrior.

Landfall -- Whenever a land enters the battlefield under your control, you gain 1 life and draw a card.

Return target creature to its owner's hand.

Vivid Meadow enters the battlefield tapped with two charge counters on it.

{T}: Add {W}.

{T}, Remove a charge counter from Vivid Meadow: Add one mana of any color.