Dosan the Falling Leaf

Players can cast spells only during their own turns.

Primal Order

At the beginning of each player's upkeep, Primal Order deals damage to that player equal to the number of nonbasic lands they control.

Collector Ouphe

Activated abilities of artifacts can't be activated.

Azusa, Lost but Seeking

You may play two additional lands on each of your turns.

Forest

Winter Orb

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

Hall of Gemstone

At the beginning of each player's upkeep, that player chooses a color. Until end of turn, lands tapped for mana produce mana of the chosen color instead of any other color.