Vennia, Sanguine Mistress

Flying
Whenever a source you control deals noncombat damage to a permanent, put a corruption counter
on it.
{1}: Gain control of target permanent with a corruption counter on it. It gains "at the
beginning of your end step, sacrifice this
permanent unless you own it".If it's a creature,
untap it and it gains haste and indestructible
until end of turn.