Is Mwonvuli Ooze legal in Standard, Modern, and Commander?

Mwonvuli Ooze is legal in: Legacy, Vintage, Commander.

What type of card is Mwonvuli Ooze?

Mwonvuli Ooze is a Creature — Ooze. Its oracle text reads: "Cumulative upkeep {2} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay {2} for each age counter on it.) Mwonvuli Ooze's power and toughness are each equal to 1 plus twice the number of age counters on it. *"Ewww!"* Power/Toughness: 1+*/1+*"

Mwonvuli Ooze

Creature — Ooze

Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay for each age counter on it.)