Mistmeadow Vanisher [March of the Machine Commander] SPA Colmena del ojo tirano except it isn't legendary if

except it isn't legendary if the spell is legendary

This explains why the goblins remain unaffected

Set: Mystery Booster Playtest Cards Type: Instant Rarity: Rare Cost: {B/R}{W/B} Choose one —

Nixilis Common Cost: Whenever a player draws a card

Mistmeadow Vanisher [March of the Machine Commander] SPA Colmena del ojo tirano except it isn't legendary ifSet: March of the Machine Commander Type: Creature Kithkin Wizard Rarity: Rare Cost: {2}{W U} Whenever Mistmeadow Vanisher becomes tapped, exile up to one target nonland, nontoken permanent. Return that card to the battlefield under its owner's control at the beginning of the next end step. Thanks to the thoughtweft, kithkin mages knew the instant one of their own was in danger.