Unlike with Scion, Ur-Dragon does not need to differentiate between on-board effects and enters the battlefield effects - all spawn are equal in the eyes of the Father
Yes in a format that craves good duplication of cards like Commander, its value rises as another in that style of card
Or maybe something related to sacrifice and recursion, like Eternal Witness and Viscera Seer
Gamechangers for the Gitrog Monster Isshin, Two Heavens As One Isshin, Two Heavens as One has just one simple ability, but its elegance and simplicity belies its power
Theres not much more to it than that, in terms of rules
All of those cards are being played by me, right now, in a deck