Cloyster

You may sacrifice a creature named Shellder and pay {u} rather than pay this spells mana cost. As long as Cloyster is untapped or blocking, it has hexproof and absorb 2. {p/u}:Cloyster deals 2 damage to target attacking or blocking creature.
{s}{s}: Cloyster deals damage equal to its power to target creature. Put a stun counter on the target if it's a nonsnow creature. {u}{u}, {t}: Cloyster