Is Crystal Golem legal in Standard, Modern, and Commander?

Crystal Golem is legal in: Legacy, Vintage, Commander.

Crystal Golem

Q: What type of card is Crystal Golem?

Crystal Golem is an Artifact Creature — Golem. Its oracle text reads: "At the beginning of your end step, Crystal Golem phases out. (While it's phased out, it's treated as though it doesn't exist. It phases in before you untap during your next untap step.)"

Artifact Creature — Golem

At the beginning of your end step, Crystal Golem phases out. (While it's phased out, it's treated as though it doesn't exist. It phases in before you untap during your next untap step.)

Set Mirage

Rarity Uncommon

Artist Mike Dringenberg