Lets check out Raz Wolpes list from the Top Cut of Liverpool Regionals
In the past with just Kuldotha Rebirth it usually wasnt worthwhile since your odds of drawing a Kuldotha Rebirth wasnt especially high and cards like Ornithopter and Memnite are pretty bad if they aren't turning into three 1/1 Goblin tokens, but now the odds are in favor of having one in hand every game
Notably, if the combo is infinite, but repeatable, it can start up again on your upkeep after you phase in
In games of booster draft Limited, players who find a lot of good green and black cards can take advantage of the tribal power that Elves have and form a midrange beatdown deck that features commanders like Llanowar Abomination and Numa, Joraga Chieftain
You need to have a reason to discard
The catch that makes this card popular is that you can use a monster your opponent controls as part of the summoning cost