Is Derelor legal in Standard, Modern, and Commander?

Derelor is legal in: Legacy, Vintage, Commander.

What type of card is Derelor?

Derelor is a Creature — Thrull. Its oracle text reads: "Black spells you cast cost {B} more to cast."

Creature — Thrull

Black spells you cast cost more to cast.

Set Fallen Empires

Rarity Rare

Artist Anson Maddocks

Creature Commander Legacy Vintage