Corvis, Undercity Assassin

Corvis, Undercity Assassin is unblockable
Whenever Corvis, Undercity Assassin attacks, each player discards their hand. Corvis, Undercity Assassin gains +X/+X until end of turn, where X is the number of cards discarded this way.
At the beggining of your next end step, each player draws cards equal to Corvis, Undercity Assassin's power.