Is Unbounded Potential legal in Standard, Modern, and Commander?

Unbounded Potential is legal in: Modern, Legacy, Vintage, Commander, Pauper.

Unbounded Potential

Q: What type of card is Unbounded Potential?

Unbounded Potential is an Instant. Its oracle text reads: "Choose one — • Put a +1/+1 counter on each of up to two target creatures. • Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.) Entwine {3}{W} (Choose both if you pay the entwine cost.)"