You can only use this effect of "Sea Stealth II" once per turn
Its also a three mana Black 2/2 that gets a +1/+1 counter on it for every Zombie card in your graveyard, which usually makes it a rather large lad
It basically puts affinity on one spell per turn, and with lots of artifact lands fully legal in Commander, Saheeli's gifts quickly become abundant
You only need white mana to cast him, so you can have him out on the field and gradually unlock new abilities as you play new lands
Spells come in several varieties: non-permanents like "sorceries" and "instants" have a single, one-time effect before they go to the "graveyard" (discard pile)
They are The effect continues to be applied as long as it remains on the field It can also be a benefit to the user Regarding the latter, as mentioned above, the former brings a literally 'different level' of influence in modern Yu-Gi-Oh