Is The Tenth Doctor legal in Standard, Modern, and Commander?

The Tenth Doctor is legal in: Legacy, Vintage, Commander.

What type of card is The Tenth Doctor?

The Tenth Doctor is a Legendary Creature — Time Lord Doctor. Its oracle text reads: "Allons-y! — Whenever you attack, exile cards from the top of your library until you exile a nonland card. Put three time counters on it. If it doesn't have suspend, it gains suspend. Timey-Wimey — {7}: Time travel three times. Activate only as a sorcery. (For each suspended card you own and each permanent you control with a time counter on it, you may add or remove a time counter. Then do it two more times.) Power/Toughness: 3/5"

The Tenth Doctor

Legendary Creature — Time Lord Doctor

Allons-y! — Whenever you attack, exile cards from the top of your library until you exile a nonland card. Put three time counters on it. If it doesn't have suspend, it gains suspend.

Timey-Wimey — : Time travel three times. Activate only as a sorcery. (For each suspended card you own and each permanent you control with a time counter on it, you may add or remove a time counter. Then do it two more times.)