Samira, the Desert Rose

Conquer
Whenever you cast a spell, if that spell does not
share a name with a card in your graveyard, put a
style counter on Samira, the Desert Rose. Then,
if Samira, the Desert Rose has six or more style
counters on it, it deals 6 damage to each
opponent and each creature an opponent
controls.
At the beginning of each end step, remove all
style counters from Samira, the Desert Rose.