Not to mention some Griffins aren't mono-White, so they wouldn't qualify with Zeriam at the lead
Many cards in this deck are pretty weak on their own, which means the opponent can easily counter if they have more powerful Character cards, particularly in the late game
Kaalia of the Vast can cheat it from your hand (since it's a dragon), Yuna, Hope of Spira can bring it back from your graveyard (since it's an enchantment), and Esper Terra can copy it and trigger most of Bahamut's value by advancing three chapters: Summon: Bahamut isnt legendary, so Esper Terra has no problem copying it
Meanwhile, there will be traces of topping up or stains on the reverse
When your deck is built to exploit it, Scapeshift reads like assemble win condition . Its one of the best green cards in MTG for land-driven strategies