Mistcaller
While this creature is on the battlefield, whenever a token creature would enter the battlefield from exile or the graveyard, exile it instead and draw a card.
I Have 3 creature (including Mistcaller) i use Saheeli Ray A1 to Spawn 4 thopter (and so draw 4 cards instead)
The UI Asked me which creature to replace by my thopter even if none come in play since exiled by Mistcaster.
INSTEAD of entering th BF, Miscaster EXILES them so i shouldn’t have to chose and remove a creature.
Should work the same as “Leader”