Skemfar Shadowsage
From Kaldheim set
Skemfar Shadowsage
Creature — Elf Cleric
2/5
When this creature enters, choose one —
• Each opponent loses X life, where X is the greatest number of creatures you control that have a creature type in common.
• You gain X life, where X is the greatest number of creatures you control that have a creature type in common.