Xemno,Volcanic Serpent

When Xemno, Volcanic Serpent enters the
battlefield or attacks you may sacrifice any
number of permanents. If you sacrifice seven or
more permanents this way then exile target
permanent.
When Xemno, Volcanic
Serpent dies deal 6 damage to any target.
{4}{b}{r}: deal 6 damage to target creature
or planeswalker.