Counterspell

Disenchant

Tundra

Plains

Black Lotus

{T}, Sacrifice Black Lotus: Add three mana of any one color.

Mox Sapphire

Mox Pearl

Stasis

Players skip their untap steps.
At the beginning of your upkeep, sacrifice Stasis unless you pay {U}.

Island

Serra Angel

Sol Ring

Savannah Lions

Time Walk

Clockwork Beast

Clockwork Beast enters the battlefield with seven +1/+0 counters on it.
At end of combat, if Clockwork Beast attacked or blocked this combat, remove a +1/+0 counter from it.
{X}, {T}: Put up to X +1/+0 counters on Clockwork Beast. This ability can't cause the total number of +1/+0 counters on Clockwork Beast to be greater than seven. Activate only during your upkeep.

Crusade

Winter Orb

As long as Winter Orb is untapped, players can't untap more than one land during their untap steps.