Mistcaller - token touching ground

Zummite

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" 

Mburn7

Did you pick a creature to replace?  I wonder if it would exile it and then trigger on the tokens attempting to take its spot.