Narci, Manic Assailant

Eminence — As long as Narci, Manic Assailant
is in the command zone or on the battlefield,
you get an experience counter whenever one or
more creatures you control deal combat damage
to a player; and creatures attack each turn if able
if you have five or more experience counters.
Whenever you cast a creature spell, it gains bloodthirst X, where X is the number of
experience counters you have.