Until end of turn, creatures you control gain ": This creature deals 1 damage to any target."

Create a Lander token. Then you may sacrifice an artifact. When you do, Lithobraking deals 2 damage to each creature.

Lunge deals 2 damage to target creature and 2 damage to target player or planeswalker.

Create a 0/1 black Wizard creature token with "Whenever you cast a noncreature spell, this token deals 1 damage to each opponent."

You and target spell's controller bid life. You start the bidding with a bid of 1. In turn order, each player may top the high bid. The bidding ends if the high bid stands. The high bidder loses life equal to the high bid. If you win the bidding, counter that spell.

Kicker — Sacrifice two lands.
Magma Burst deals 3 damage to any target. If this spell was kicked, it deals 3 damage to another target.

Magma Jet deals 2 damage to any target. Scry 2.

Magma Spray deals 2 damage to target creature. If that creature would die this turn, exile it instead.

Delve
Magmatic Sinkhole deals 5 damage to target creature or planeswalker.

Attach target Equipment to target creature. (Control of the Equipment doesn't change.)

Add for each nonland permanent with art by the artist of your choice.

Manhole Missile deals 3 damage to target creature. You may put a card from your hand on the bottom of your library. If you do, draw a card.

Marvelous Melee deals 6 damage to target creature.
Basic landcycling

Massive Raid deals damage to any target equal to the number of creatures you control.

Cast this spell only during combat on your turn before blockers are declared.
You choose which creatures block this combat and how those creatures block.
Whenever a creature attacks and isn't blocked this combat, untap it and remove it from combat.

Melt Through deals 2 damage to any target. If it's a creature, it perpetually gains "As long as this creature is on the battlefield, damage isn't removed from it during cleanup steps."

Each attacking creature gets +1/+0 until end of turn for each nonbasic land defending player controls.

Target creature gains trample until end of turn. It also gets +1/+0 until end of turn if you control a Mouse.
Draw a card.

If it's your turn, you may sacrifice a Mountain rather than pay this spell's mana cost.
Mine Collapse deals 5 damage to target creature or planeswalker.

Choose one —
• Create two 1/1 colorless Soldier artifact creature tokens.
• Creatures you control get +2/+0 until end of turn.

Misthios's Fury deals 3 damage to target creature. If you control an Equipment, Misthios's Fury also deals 2 damage to that creature's controller.

If an opponent controls an Island and you control a Mountain, you may cast this spell without paying its mana cost.
Destroy target artifact.

Choose one —
• Molten Blast deals 2 damage to target creature or planeswalker.
• Destroy target artifact.

Destroy target artifact creature.
Cycling

Counter target instant or sorcery spell unless its controller has Molten Influence deal 4 damage to them.

Until end of turn, whenever you tap a Mountain for mana, add an additional .

Target creature gets +2/+0 until end of turn. Create a Monster Role token attached to it. (If you control another Role on it, put that one into the graveyard. Enchanted creature gets +1/+1 and has trample.)

This spell costs less to cast if it's night.
Moonrager's Slash deals 3 damage to any target.

Choose one —
• Create a 1/1 colorless Robot artifact creature token.
• Target creature gets +3/+0 and gains first strike until end of turn.

Target player exiles all land cards from their graveyard.