Back in the original Innistrad , the Delver started out as an ordinary human albeit one with an intense fascination with doing experiments on insects
Especially when compared to the dark atmosphere of Yen Sid's card
2 Mother Gothel: Selfish Manipulator Mother knows best and this is not a card you want to pass on
For me, the tipping point is in the card type creatures are just much better than sorceries, adding the utility of attacking and blocking, paying sacrifice and convoke costs and everything else you need a body for in Magic
All of this is present in what we've seen so far from the TMNT set, but we're also seeing a new opportunity for card draw, which might finally help with ensuring you always have valuable cards in hand
Likewise, Bastion Protector offers Indestructible, a keyword that matters a lot less now