Is Bladecoil Serpent legal in Standard, Modern, and Commander?

Bladecoil Serpent is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Bladecoil Serpent?

Bladecoil Serpent is an Artifact Creature — Serpent. Its oracle text reads: "When this creature enters, for each {U}{U} spent to cast it, draw a card. When this creature enters, for each {B}{B} spent to cast it, each opponent discards a card. When this creature enters, for each {R}{R} spent to cast it, it gets +1/+0 and gains trample and haste until end of turn."