"Rook" Thorne, Veilguard

First Strike, Vigilance
Valiant— Whenever this creature is targeted
by a spell or ability you control for the first
time each turn, put a +1/+1 counter on each of up
to X target creatures you control, where X is this creatures power.
If a creature you control becoming the target
of a spell or ability causes a triggered ability of
a permanent you control to trigger, that ability triggers an additional time.