Oath of Druids [Exodus] Archon where X is Esper Sentinel's

where X is Esper Sentinel's power

Even if the halls stand empty

Set: The Lost Caverns of Ixalan Special Guests Type: Legendary Creature — Merfolk Wizard Rarity: Rare Cost: {G}{U} {4}: Scry 1

then proliferate again

Oath of Druids [Exodus] Archon where X is Esper Sentinel'sSet: Exodus Type: Enchantment Rarity: Rare Cost: {1}{G} At the beginning of each player's upkeep, that player chooses target player who controls more creatures than they do and is their opponent. The first player may reveal cards from the top of their library until they reveal a creature card. If the first player does, that player puts that card onto the battlefield and all other cards revealed this way into their graveyard.