Karma

At the beginning of each player's upkeep, Karma deals damage to that player equal to the number of Swamps they control.

Mudhole

Target player exiles all land cards from their graveyard.

Dispersal Shield

Counter target spell if its mana value is less than or equal to the highest mana value among permanents you control.

Summer Bloom

You may play up to three additional lands this turn.

Primeval Protector

This spell costs {1} less to cast for each creature your opponents control.
When Primeval Protector enters, put a +1/+1 counter on each other creature you control.

Quest for Renewal

Whenever a creature you control becomes tapped, you may put a quest counter on Quest for Renewal.
As long as there are four or more quest counters on Quest for Renewal, untap all creatures you control during each other player's untap step.

Deprive

As an additional cost to cast this spell, return a land you control to its owner's hand.
Counter target spell.

Royal Decree

Cumulative upkeep {W} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
Whenever a Swamp, Mountain, black permanent, or red permanent becomes tapped, Royal Decree deals 1 damage to that permanent's controller.

Elvish Spirit Guide

Exile Elvish Spirit Guide from your hand: Add {G}.

One with Nature

Enchant creature
Whenever enchanted creature deals combat damage to a player, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.