Is Chromium legal in Standard, Modern, and Commander?

Chromium is legal in: Legacy, Vintage, Commander.

Chromium

Q: What type of card is Chromium?

Chromium is a Legendary Creature — Elder Dragon. Its oracle text reads: "FlyingRampage 2 (Whenever this creature becomes blocked, it gets +2/+2 until end of turn for each creature blocking it beyond the first.)At the beginning of your upkeep, sacrifice Chromium unless you pay {W}{U}{B}."

Legendary Creature — Elder Dragon

Flying<br>Rampage 2 (Whenever this creature becomes blocked, it gets +2/+2 until end of turn for each creature blocking it beyond the first.)<br>At the beginning of your upkeep, sacrifice Chromium unless you pay .

Set Legends

Rarity Rare

Artist Edward P. Beard, Jr.