Is Gargadon legal in Standard, Modern, and Commander?

Gargadon is legal in: Modern, Legacy, Vintage, Commander, Pauper.

Gargadon

Q: What type of card is Gargadon?

Gargadon is a Creature — Beast. Its oracle text reads: "Trample Suspend 4—{1}{R} (Rather than cast this card from your hand, you may pay {1}{R} and exile it with four time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost. It has haste.)"

Creature — Beast

Trample

Suspend 4— (Rather than cast this card from your hand, you may pay and exile it with four time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost. It has haste.)