Shimmer Myr
Artifact Creature — Myr
Flash
You may cast artifact spells as though they had flash.
It evades Phyrexians by hiding in the spaces between seconds.
Jana Schirmer & Johannes Voss
Commander Masters (CMM)
• #409Rulings
Shimmer Myr has no effect on artifact lands because they aren't cast as spells.
(wotc • 2020-11-10)
Once you announce that you're casting a spell, players can't attempt to remove Shimmer Myr from the battlefield to make that casting illegal. Removing Shimmer My after you've cast a spell won't affect that spell.
(wotc • 2020-11-10)
Rulings
Shimmer Myr has no effect on artifact lands because they aren't cast as spells.
(wotc • 2020-11-10)
Once you announce that you're casting a spell, players can't attempt to remove Shimmer Myr from the battlefield to make that casting illegal. Removing Shimmer My after you've cast a spell won't affect that spell.
(wotc • 2020-11-10)