Rootwater Shaman

Flash (You may cast this spell any time you could cast an instant.)

Flying

You may cast spells as though they had flash.

Flash

You may cast Secret Lair spells as though they had flash.

Secret Lair spells you cast cost less to cast.

Flash

When this creature enters, put a shield counter on another target creature you control. (If it would be dealt damage or destroyed, remove a shield counter from it instead.)

You may cast Merfolk spells as though they had flash.

Flash

Flying

During each opponent's end step, you may cast spells as though they had flash.

Flash

Flying

You may cast historic spells as though they had flash. (Artifacts, legendaries, and Sagas are historic.)

Myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)

Instant and sorcery spells you cast cost less to cast.

You may cast sorcery spells as though they had flash.