Esper Sentinel [Modern Horizons 2 Prerelease Promos] XY53 You can only activate this

You can only activate this effect during your Main Phase or your opponent's Battle Phase

you can Special Summon this card to your side of the field

When your opponent's monster declares an attack

Set: Battle Pack 3: Monster League Card type: Spell Card Rarity: Common Target 1 Warrior-Type monster in your Graveyard

Esper Sentinel [Modern Horizons 2 Prerelease Promos] XY53 You can only activate thisSet: Modern Horizons 2 Prerelease Promos Type: Artifact Creature Human Soldier Rarity: Rare Cost: {W} 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. The more Esper changes, the more he refuses to.