Is Mirrex legal in Standard, Modern, and Commander?

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

What type of card is Mirrex?

Mirrex is a Land — Sphere. Its oracle text reads: "{T}: Add {C}. {T}: Add one mana of any color. Activate only if this land entered this turn. {3}, {T}: Create a 1/1 colorless Phyrexian Mite artifact creature token with toxic 1 and "This token can't block." (Players dealt combat damage by it also get a poison counter.)"

Mirrex

Land — Sphere

: Add .

: Add one mana of any color. Activate only if this land entered this turn.

, : Create a 1/1 colorless Phyrexian Mite artifact creature token with toxic 1 and "This token can't block." (Players dealt combat damage by it also get a poison counter.)