Russyalla, Blood Sailor

You may pay 8 life rather than pay this spell's
mana cost.
At the beginning of your end step, if you lost
life this turn, put a +1/+1 counter on this
creature. If this creature has eight or more
+1/+1 counters, sacrifice it.
Instant and sorcery spells you cast cost {1} less
for each +1/+1 counter on this creature and
deals 1 damage to you.