entropic wayfarer

{1}, {t}, sacrifice a creature in play, put a +X/+3 counter on Entropic Wayfarer. power is determined by the total of
mana
cost of each {b} card in play.
{b}{b}{2}, {t}, cast Entropic Wayfarer from your graveyard, in addition all players loose 2 life points
indestructible - any target spell that says "destroy" does not affect this card
"the endless strides he takes, the land he chars. such power within the one who sleeps."