Soligni, Ascended Phoenix

Flying, haste. When an opponent plays a
non-white creature, deal damage to that creature
equal to Soligni, Ascended Phoenix's power.
{4}{w}{b}: Sacrifice all other creatures you control.
For each creature sacrificed, place 1 counter on Soligni, Ascended Phoenix. It gains +1/+1 for
each counter on it and indestructible while it has
at least 1 counter. During your end step, remove
1 counter from Soligni, Ascended Phoenix if it
has any.