Gerzora, Sub-Zero Cuttlefish

Whenever a Octopus or Squid is placed on the battlefield put a +1/+1 counter on Gezora. Octopuses and Squids get a +1/+1 counter for each +1/+1 counter on Gezora
Octopus and Squid spells cost {1} less to cast.
{3}{u}: sacrifice target Octopus or Squid, deal damage to target opponent or Planeswalker, equal to its attack.