Is Cloud's Limit Break legal in Standard, Modern, and Commander?

Cloud's Limit Break is legal in: Legacy, Vintage, Commander.

What type of card is Cloud's Limit Break?

Cloud's Limit Break is an Instant. Its oracle text reads: "Tiered (Choose one additional cost.) • Cross-Slash — {0} — Destroy target tapped creature. • Blade Beam — {1} — Destroy any number of target tapped creatures with different controllers. • Omnislash — {3}{W} — Destroy all tapped creatures."