For instance, the Final Fantasy 14-based Scions & Spellcraft deck is mostly concerned with casting non-creature spells, but packs in too many creatures representing the games characters
After that opponent is chosen, you choose whether damage will be dealt to that player or to a planeswalker they control, and if so, which planeswalker
Fynn doesn't have to still be on the battlefield when someone (preferably an opponent) gets their tenth poison counter
If you prefer a more aggressive approach, you may get frustrated by some of the finesse of this deck, and what at times can feel like an over-reliance on Action and Song cards to really get going
By the way, BGU mana cost is also quite fitting (at least for me), possibly representing Sin's connections to oceans (blue), death (black), and the natural cycle it's strangely bound to (green)
Look no further than the Lorcana Gateway, a tutorial and mini-adventure tucked inside a single game