As an additional cost to cast this spell, exile Sanga of the Thunder, Kazejin and Suijin from your hand, graveyard or battlefield.

Gate Guardian can't be countered.

Vigilance, reach, trample

At the beginning of each combat, exile target nonland permanent an opponent controls. Gate Guardian gets +X/+X, X being each of that card's colors.

{W}{U}{B}{R}{G}: Put one of the exiled creatures used to cast this spell onto the battlefield and shuffle the rest into your library. Destroy Gate Guardian.