Is Sidisi, Regent of the Mire legal in Standard, Modern, and Commander?

Sidisi, Regent of the Mire is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Sidisi, Regent of the Mire

Q: What type of card is Sidisi, Regent of the Mire?

Sidisi, Regent of the Mire is a Legendary Creature — Zombie Snake Warlock. Its oracle text reads: "{T}, Sacrifice a creature you control with mana value X other than Sidisi: Return target creature card with mana value X plus 1 from your graveyard to the battlefield. Activate only as a sorcery."

Legendary Creature — Zombie Snake Warlock

$0.35 ↗20 similarCommander, Modern

, Sacrifice a creature you control with mana value X other than Sidisi: Return target creature card with mana value X plus 1 from your graveyard to the battlefield. Activate only as a sorcery.