hydra\'s spike

Sacrifice a creature: Add one mana of any color.

Whenever a -1/-1 counter is put on a creature, you may create a 1/1 green Elf Warrior creature token.

, Remove a -1/-1 counter from a creature you control: This creature gets +3/+3 until end of turn.

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) If damage would be dealt to this creature, prevent that damage. Put a -1/-1 counter on this creature for each 1 damage prevented this way.