Is Deep Spawn legal in Standard, Modern, and Commander?

Deep Spawn is legal in: Legacy, Vintage, Commander.

What type of card is Deep Spawn?

Deep Spawn is a Creature — Homarid. Its oracle text reads: "TrampleAt the beginning of your upkeep, sacrifice Deep Spawn unless you mill two cards.{U}: Deep Spawn gains shroud until end of turn and doesn't untap during your next untap step. Tap Deep Spawn. (A creature with shroud can't be the target of spells or abilities.)"

Deep Spawn

Creature — Homarid

Trample<br>At the beginning of your upkeep, sacrifice Deep Spawn unless you mill two cards.<br>: Deep Spawn gains shroud until end of turn and doesn't untap during your next untap step. Tap Deep Spawn. (A creature with shroud can't be the target of spells or abilities.)

Set Fallen Empires

Rarity Uncommon

Artist Mark Tedin