Sporest

Defender, infect (It deals damage to creatures in the
form of -1/-1 counters and to players in the form of
poison counters.)
1, {t}, Discard a card from your hand,or exile a
card from your graveyard: Sporest gets +X/+X
until end of turn where X is that spells converted
mana cost.
Any Elves that manage to return from the Sporest
come back putrid and withered.