Realistically I think this is a really big draw spell tied to a creature, and if you're playing a deck that often dumps their hand he can be a good way to refuel
Theres a bunch of other cards with similar synergy ones that let you mill cards into the graveyard and then return them, with the effect buffing Kotis by two +1/+1 each turn
Theres also some big-mana effects like Virtue of Persistence and Portal to Phyrexia which steal creatures from graveyards every single turn
But you can also heap +1/+1 counters on cards like Hopeful Initiate and Anim Pakal, Thousandth Moon, or rely on it to power up flashy artifacts like Darksteel Reactor and Lux Artillery for something less conventional
Mox Amber Yeah, its a Mox, but Mox Amber is part of the balanced Moxes that were deliberately made trickier to use so as to not make them auto-includes
(To forage, exile three cards from your graveyard or sacrifice a Food.) Destroy target creature or planeswalker