Thunderclap

You may sacrifice a Mountain rather than pay this spell's mana cost.
Thunderclap deals 3 damage to target creature.

Glowing Anemone

When Glowing Anemone enters, you may return target land to its owner's hand.

Rishadan Airship

Flying
Rishadan Airship can block only creatures with flying.

Pulverize

You may sacrifice two Mountains rather than pay this spell's mana cost.
Destroy all artifacts.

Hoodwink

Return target artifact, enchantment, or land to its owner's hand.

Stone Rain

Energy Flux

All artifacts have "At the beginning of your upkeep, sacrifice this artifact unless you pay {2}."

Island

Cinder Elemental

{X}{R}, {T}, Sacrifice Cinder Elemental: It deals X damage to any target.

Rishadan Footpad

When Rishadan Footpad enters, each opponent sacrifices a permanent unless they pay {2}.

Diplomatic Escort

{U}, {T}, Discard a card: Counter target spell or ability that targets a creature.

Tectonic Break

Two-Headed Dragon

Flying
Menace (This creature can't be blocked except by two or more creatures.)
Two-Headed Dragon can block an additional creature each combat.
{1}{R}: Two-Headed Dragon gets +2/+0 until end of turn.