Is Trenzalore Clocktower legal in Standard, Modern, and Commander?

Trenzalore Clocktower is legal in: Legacy, Vintage, Commander.

Trenzalore Clocktower

Q: What type of card is Trenzalore Clocktower?

Trenzalore Clocktower is a Legendary Land. Its oracle text reads: "{T}: Add {U}. Put a time counter on Trenzalore Clocktower. {1}{U}, {T}, Remove twelve time counters from Trenzalore Clocktower and exile it: Shuffle your graveyard and hand into your library, then draw seven cards. Activate only if you control a Time Lord."

Legendary Land

: Add . Put a time counter on Trenzalore Clocktower.

, , Remove twelve time counters from Trenzalore Clocktower and exile it: Shuffle your graveyard and hand into your library, then draw seven cards. Activate only if you control a Time Lord.