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.
1 /
1
--
Flooded Strand
Land
{T}, Pay 1 life, Sacrifice Flooded Strand: Search your library for a Plains or Island card, put it onto the battlefield, then shuffle.
{U}
Fly
Enchantment - Aura
Enchant creature
Enchanted creature has flying and "Whenever this creature deals combat damage to a player, venture into the dungeon." (Enter the first room or advance to the next room.)
{1}{U}{U}
Force of Negation
Instant
If it's not your turn, you may exile a blue card from your hand rather than pay this spell's mana cost.
Counter target noncreature spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.
{1}{W}{U}
Geist of Saint Traft
Legendary Creature - Spirit Cleric
Hexproof (This creature can't be the target of spells or abilities your opponents control.)
Whenever Geist of Saint Traft attacks, create a 4/4 white Angel creature token with flying that's tapped and attacking. Exile that token at end of combat.
2 /
2
--
Gemstone Caverns
Legendary Land
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.
{U/P}
Gitaxian Probe
Sorcery
({U/P} can be paid with either {U} or 2 life.)
Look at target player's hand.
Draw a card.
--
Hallowed Fountain
Land - Plains Island
({T}: Add {W} or {U}.)
As Hallowed Fountain enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.
{W}
Hyena Umbra
Enchantment - Aura
Enchant creature
Enchanted creature gets +1/+1 and has first strike.
Totem armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)
--
Irrigated Farmland
Land - Plains Island
({T}: Add {W} or {U}.)
Irrigated Farmland enters the battlefield tapped.
Cycling {2} ({2}, Discard this card: Draw a card.)
{0}
Jeweled Amulet
Artifact
{1}, {T}: Put a charge counter on Jeweled Amulet. Note the type of mana spent to pay this activation cost. Activate only if there are no charge counters on Jeweled Amulet.
{T}, Remove a charge counter from Jeweled Amulet: Add one mana of Jeweled Amulet's last noted type.
{W/U}
Judge's Familiar
Creature - Bird
Flying
Sacrifice Judge's Familiar: Counter target instant or sorcery spell unless its controller pays {1}.
1 /
1
{1}{W}
Lion Sash
Artifact Creature - Equipment Cat
{W}: Exile target card from a graveyard. If it was a permanent card, put a +1/+1 counter on Lion Sash.
Equipped creature gets +1/+1 for each +1/+1 counter on Lion Sash.
Reconfigure {2} ({2}: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)
1 /
1
{0}
Lotus Petal
Artifact
{T}, Sacrifice Lotus Petal: Add one mana of any color.
{X}{W}
March of Otherworldly Light
Instant
As an additional cost to cast this spell, you may exile any number of white cards from your hand. This spell costs {2} less to cast for each card exiled this way.
Exile target artifact, creature, or enchantment with mana value X or less.
{U/P}
Mental Misstep
Instant
({U/P} can be paid with either {U} or 2 life.)
Counter target spell with mana value 1.
{W}
On Thin Ice
Snow Enchantment - Aura
Enchant snow land you control
When On Thin Ice enters the battlefield, exile target creature an opponent controls until On Thin Ice leaves the battlefield.
--
Otawara, Soaring City
Legendary Land
{T}: Add {U}.
Channel -- {3}{U}, Discard Otawara, Soaring City: Return target artifact, creature, enchantment, or planeswalker to its owner's hand. This ability costs {1} less to activate for each legendary creature you control.
{U}
Ponder
Sorcery
Look at the top three cards of your library, then put them back in any order. You may shuffle.
Draw a card.
{U}
Preordain
Sorcery
Scry 2, then draw a card. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)
{X}{W}
Prismatic Ending
Sorcery
Converge -- Exile target nonland permanent if its mana value is less than or equal to the number of colors of mana spent to cast this spell.
--
Prismatic Vista
Land
{T}, Pay 1 life, Sacrifice Prismatic Vista: Search your library for a basic land card, put it onto the battlefield, then shuffle.
{2}{U}
Psionic Blast
Instant
Psionic Blast deals 4 damage to any target and 2 damage to you.
--
Remote Farm
Land
Remote Farm enters the battlefield tapped with two depletion counters on it.
{T}, Remove a depletion counter from Remote Farm: Add {W}{W}. If there are no depletion counters on Remote Farm, sacrifice it.
--
Saprazzan Skerry
Land
Saprazzan Skerry enters the battlefield tapped with two depletion counters on it.
{T}, Remove a depletion counter from Saprazzan Skerry: Add {U}{U}. If there are no depletion counters on Saprazzan Skerry, sacrifice it.
{1}{W}{W}
Skyclave Apparition
Creature - Kor Spirit
When Skyclave Apparition enters the battlefield, 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.
2 /
2
{1}{U}
Snapcaster Mage
Creature - Human Wizard
Flash
When Snapcaster Mage enters the battlefield, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)
2 /
1
--
Snow-Covered Island
Basic Snow Land - Island
({T}: Add {U}.)
--
Snow-Covered Island
Basic Snow Land - Island
({T}: Add {U}.)
--
Snow-Covered Island
Basic Snow Land - Island
({T}: Add {U}.)
--
Snow-Covered Island
Basic Snow Land - Island
({T}: Add {U}.)
--
Snow-Covered Island
Basic Snow Land - Island
({T}: Add {U}.)
--
Snow-Covered Plains
Basic Snow Land - Plains
({T}: Add {W}.)
--
Snow-Covered Plains
Basic Snow Land - Plains
({T}: Add {W}.)
{U}
Spell Pierce
Instant
Counter target noncreature spell unless its controller pays {2}.
{2}{W/U}
Steel of the Godhead
Enchantment - Aura
Enchant creature
As long as enchanted creature is white, it gets +1/+1 and has lifelink. (Damage dealt by the creature also causes its controller to gain that much life.)
As long as enchanted creature is blue, it gets +1/+1 and can't be blocked.
{U}
Stern Scolding
Instant
Counter target creature spell with power or toughness 2 or less.
{W}
Swords to Plowshares
Instant
Exile target creature. Its controller gains life equal to its power.
--
Tundra
Land - Plains Island
({T}: Add {W} or {U}.)
{U}
Wash Away
Instant
Cleave {1}{U}{U} (You may cast this spell for its cleave cost. If you do, remove the words in square brackets.)
Counter target spell [that wasn't cast from its owner's hand].
{2}{W}
White Plume Adventurer
Creature - Orc Cleric
When White Plume Adventurer enters the battlefield, you take the initiative.
At the beginning of each opponent's upkeep, untap a creature you control. If you've completed a dungeon, untap all creatures you control instead.
3 /
3
{2}{U}
Back to Basics
Enchantment
Nonbasic lands don't untap during their controllers' untap steps.
{1}{W}
Containment Priest
Creature - Human Cleric
Flash
If a nontoken creature would enter the battlefield and it wasn't cast, exile it instead.
2 /
2
{2}{W}
Flawless Maneuver
Instant
If you control a commander, you may cast this spell without paying its mana cost.
Creatures you control gain indestructible until end of turn.
{W}
Fragmentize
Sorcery
Destroy target artifact or enchantment with mana value 4 or less.
{1}
Pithing Needle
Artifact
As Pithing Needle enters the battlefield, choose a card name.
Activated abilities of sources with the chosen name can't be activated unless they're mana abilities.
{2}{U}
Propaganda
Enchantment
Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.
{1}{W}
Rest in Peace
Enchantment
When Rest in Peace enters the battlefield, exile all graveyards.
If a card or token would be put into a graveyard from anywhere, exile it instead.
{1}{W}
Selfless Spirit
Creature - Spirit Cleric
Flying
Sacrifice Selfless Spirit: Creatures you control gain indestructible until end of turn.
2 /
1
{1}{W}
Spiritual Focus
Enchantment
Whenever a spell or ability an opponent controls causes you to discard a card, you gain 2 life and you may draw a card.
{2}{W}
Teyo, the Shieldmage
Legendary Planeswalker - Teyo
You have hexproof. (You can't be the target of spells or abilities your opponents control.)
-2: Create a 0/3 white Wall creature token with defender.