Static Orb

As long as this artifact is untapped, players can't untap more than two permanents during their untap steps.

Patron of the Orochi

Snake offering (You may cast this spell any time you could cast an instant by sacrificing a Snake and paying the difference in mana costs between this and the sacrificed Snake. Mana cost includes color.)
{T}: Untap all Forests and all green creatures. Activate only once each turn.

Winter Moon

Players can't untap more than one nonbasic land during their untap steps.

Storage Matrix

As long as this artifact is untapped, each player chooses artifact, creature, or land during their untap step. That player can untap only permanents of the chosen type this step.

Winter Orb

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