Jake Jr.

When Jake Jr. enters the battlefield, if you
control five different rainicorn dog they
transform into Super Pup until end of turn.
(They are considered as one creature. Their
abilities also targets Super Pup)
Super Pup has haste and hexproof. It's strength
and toughness are equal to their total strength
and toughness, respectively.
{1}, Return Jake Jr. to your hand : Search a
rainicorn or dog card and put it on top of your
library.