Price of Glory

Whenever a player taps a land for mana, if it's not that player's turn, destroy that land.

Tectonic Break

Each player sacrifices X lands of their choice.

Leyline of Punishment

If this card is in your opening hand, you may begin the game with it on the battlefield.
Players can't gain life.
Damage can't be prevented.

Manabarbs

Whenever a player taps a land for mana, this enchantment deals 1 damage to that player.

Vazi, Keen Negotiator

Haste
{T}: Target opponent creates X Treasure tokens, where X is the number of Treasure tokens you created this turn.
Whenever an opponent casts a spell or activates an ability, if mana from a Treasure was spent to cast it or activate it, put a +1/+1 counter on target creature, then draw a card.

Wildfire

Each player sacrifices four lands of their choice. Wildfire deals 4 damage to each creature.

Keldon Firebombers

When this creature enters, each player sacrifices all lands they control except for three.

Bend or Break

Each player separates all nontoken lands they control into two piles. For each player, one of their piles is chosen by one of their opponents of their choice. Destroy all lands in the chosen piles. Tap all lands in the other piles.

Burning Sands

Whenever a creature dies, that creature's controller sacrifices a land of their choice.

Bust

Boom

Destroy target land you control and target land you don't control.

Boom // Bust

Winter Orb

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

Mana Web

Whenever a land an opponent controls is tapped for mana, tap all lands that player controls that could produce any type of mana that land could produce.

Static Orb

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

War's Toll

Whenever an opponent taps a land for mana, tap all lands that player controls.
If a creature an opponent controls attacks, all creatures that opponent controls attack if able.