Vengeful Elf

Shadow (This creature can block or be
blocked by only creatures with shadow.)
Vengeful Elf is not a shadow if another creature
on the field has equal or lesser toughness.
If another spell or ability would put this card
into play you may pay {1} mana to search your
library for a creature; move that creature to your
hand or graveyard and discard one card from
the top of your library or hand.