Mountain

(T: Add W.)

2WU: Exile target creature. Return that card to the battlefield under its owner's control at the beginning of the next end step.

(T: Add W.)

Flying, trample Join forces — Whenever this creature attacks or blocks, each player starting with you may pay any amount of mana. This creature gets +X/+0 until end of turn, where X is the total amount of mana paid this way.

Return all permanents of the color of your choice to their owners' hands.

Equipped creature has haste and shroud. (It can't be the target of spells or abilities.) Equip 0

Put target nonland permanent into its owner's library just beneath the top X cards of that library.

Vigilance T: Reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put it into your hand.