Silt Crawler

When this creature enters, tap all lands you control.

Citadel of Pain

At the beginning of each player's end step, this enchantment deals X damage to that player, where X is the number of untapped lands they control.

Keldon Berserker

Whenever this creature attacks, if you control no untapped lands, it gets +3/+0 until end of turn.

Seal of Fire

Sacrifice this enchantment: It deals 2 damage to any target.

Mountain

Flameshot

You may discard a Mountain card rather than pay this spell's mana cost.
Flameshot deals 3 damage divided as you choose among one, two, or three target creatures.

Mungha Wurm

You can't untap more than one land during your untap step.

Rhystic Lightning

Rhystic Lightning deals 4 damage to any target unless that permanent's controller or that player pays {2}. If they do, Rhystic Lightning deals 2 damage to the permanent or player.

Scoria Cat

This creature gets +3/+3 as long as you control no untapped lands.

Zerapa Minotaur

First strike
{2}: This creature loses first strike until end of turn. Any player may activate this ability.

Forest

Latulla, Keldon Overseer

{X}{R}, {T}, Discard two cards: Latulla deals X damage to any target.

Invigorate

If you control a Forest, rather than pay this spell's mana cost, you may have an opponent gain 3 life.
Target creature gets +4/+4 until end of turn.

Barbed Field

Enchant land
Enchanted land has "{T}: This land deals 1 damage to any target."

Squallmonger

{2}: This creature deals 1 damage to each creature with flying and each player. Any player may activate this ability.

Stampede Driver

{1}{G}, {T}, Discard a card: Creatures you control get +1/+1 and gain trample until end of turn.

War Cadence

{X}{R}: This turn, creatures can't block unless their controller pays {X} for each blocking creature they control.

Vintara Snapper

This creature has shroud as long as you control no untapped lands. (It can't be the target of spells or abilities.)

Spur Grappler

This creature gets +2/+1 as long as you control no untapped lands.

Kyren Negotiations

Tap an untapped creature you control: This enchantment deals 1 damage to target player or planeswalker.

Reverent Silence

If you control a Forest, rather than pay this spell's mana cost, you may have each other player gain 6 life.
Destroy all enchantments.

Vine Trellis

Defender (This creature can't attack.)
{T}: Add {G}.

Desert Twister

Chimeric Idol

{0}: Tap all lands you control. This artifact becomes a 3/3 Turtle artifact creature until end of turn.