Is Hellkite Courser legal in Standard, Modern, and Commander?

Hellkite Courser is legal in: Legacy, Vintage, Commander.

Hellkite Courser

Q: What type of card is Hellkite Courser?

Hellkite Courser is a Creature — Dragon. Its oracle text reads: "Flying When this creature enters, you may put a commander you own from the command zone onto the battlefield. It gains haste. Return it to the command zone at the beginning of the next end step."

Creature — Dragon

Flying

When this creature enters, you may put a commander you own from the command zone onto the battlefield. It gains haste. Return it to the command zone at the beginning of the next end step.

Set Tarkir: Dragonstorm Commander

Rarity Mythic Rare

Mana Value 6

Artist Caio Monteiro

Collector # 218

Scryfall Gatherer