Call of the Berserker

If an ability says you may sacrifice a creature, you
may now sacrifice any number of creatures instead.
That ability triggers for each creature sacrificed
this way. (I.e, If an ability says sacrifice a creature
draw a card, for each creature sacrificed draw a card.)
Blood lust X. ( When this creature deals combat
damage to a player or destroys a creature you may sacrifice a creature, if you do put X +1/+1 counter
on this creature, X is the number of creatures sacrificed for this abil