Aclazotz, Deepest Betrayal [The Lost Caverns of Ixalan]

Flying, lifelink
Whenever Aclazotz attacks, each opponent discards a card. For each opponent who can't, you draw a card.
Whenever an opponent discards a land card, create a 1/1 black Bat creature token with flying.
When Aclazotz dies, return it to the battlefield tapped and transformed under its owner's control.
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Temple of the Dead
(Transforms from Aclazotz, Deepest Betrayal.)
T: Add B.
2B, T: Transform Temple of the Dead. Activate only if a player has one or fewer cards in hand and only as a sorcery.