Pliosaurus Funkei

Islandwalk, Trample
When Pliosaurus Funkei enters the
battlefield, if the era is Jurassic, you may pay {5}. If you do, destroy all other creatures. Place a +1/+1 counter on Pliosaurus Funkei for every creature destroyed this way.
Pliosaurus Funkei costs {1} less to cast for every
Plesiosaur you control.
Sacrifice a Plesiosaur: Place X +1/+1 counters on Pliosaurus Funkei where X whas the sacrificed creatures power