Rimuru Tempest, Demon Lord

Flying, ward {3}.
{u/b}{u/b}{u/b}, exile target spell or permanent in the field or
any graveyard, Rimuru Tempest, Demon Lord gains the abilities of any card exiled with the effect of any card
whose name includes "Rimuru Tempest".
This ability costs {1} more each time used.
The first time a creature any opponent controls
would die each turn, exile it instead.