Fetid Swarm

Swarm (You may tap any number of other untapped
1/1 creatures you control to counter a spell or ability targeting this card unless its controller pays an
additional {1} for each creature tapped this way.)
Fetid Swarm enters play with X +1/+1 counters.
X is equal to the converted mana cost of a
creature card you exile from your graveyard.
Creatures blocking Fetid Swarm gain "Upkeep -
Put a -1/-1 counter on this creature."