Hero's Uncle [Unknown Event] playmate where X is Esper Sentinel's

where X is Esper Sentinel's power

Add an amount of B equal to the sacrifice creature's mana value

Ceaseless Tempest — Whenever Storm deals combat damage to a player

Whenever a Clue you control is put into a graveyard from the battlefield

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Hero's Uncle [Unknown Event] playmate where X is Esper Sentinel'sSet: Unknown Event Type: Creature Human Rarity: Common When Hero's Uncle dies, you may search your library for a legendary team up creature, reveal it, put it into your hand, then shuffle. (A legendary team up creature is two or more legendary characters teamed up on the same legendary creature card, such as Drana and Linvala.)