The end step triggered ability won't trigger, and the cards won't be put into their owner's graveyard
Starting off by milling yourself and reanimating an Elf (or, notably, an Elf-supporting Tyvar planeswalker card), the card immediately provides the board presence that Elves live and die on
Late Game: You hard cast it for 5 mana, ideally paying both double Red and double Green, to get a 4/4 body, remove a threat, and tutor a powerful utility land
This is however four mana to tutor a thing up from your deck and put it into the bin, a mere three if you already had the thing you want in question
For example, anteater has been completely removed while hounds are now considered dogs
Your deck must be at least 60 cards