The Master of Keys

T: Add C. T: Add B or G. This artifact deals 1 damage to you.

You have no maximum hand size. T: Add C.

Equipped creature can't be blocked and has shroud. (It can't be the target of spells or abilities.) Equip 2

T: Add C. T: Add W or U. This land deals 1 damage to you.

This land enters tapped. T: Add W, U, or B.

(T: Add B or R.) This land enters tapped unless you control two or more basic lands.

Hideaway 4 (When this land enters, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.) This land enters tapped. T: Add R. R, T: You may play the exiled card without paying its mana cost if an opponent was dealt 7 or more damage this turn.

T: Add C. T: Add B or R. This land deals 1 damage to you.