Peregrine Mask

Equipped creature has defender, flying, and first strike.
Equip {2}

Mana Maze

Players can't cast spells that share a color with the spell most recently cast this turn.

Izzet Signet

Island

Sparkhunter Masticore

As an additional cost to cast this spell, discard a card.
Protection from planeswalkers
{1}: This creature deals 1 damage to target planeswalker.
{3}: This creature gains indestructible until end of turn.

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.

Mountain

Creepy Doll

Indestructible
Whenever this creature deals combat damage to a creature, flip a coin. If you win the flip, destroy that creature.

Stuffy Doll

Indestructible
As this creature enters, choose a player.
Whenever this creature is dealt damage, it deals that much damage to the chosen player.
{T}: This creature deals 1 damage to itself.

Izzet Boilerworks

This land enters tapped.
When this land enters, return a land you control to its owner's hand.
{T}: Add {U}{R}.

Mana Cache

At the beginning of each player's end step, put a charge counter on this enchantment for each untapped land that player controls.
Remove a charge counter from this enchantment: Add {C}. Any player may activate this ability but only during their turn before the end step.

Sun Droplet

Whenever you're dealt damage, put that many charge counters on this artifact.
At the beginning of each upkeep, you may remove a charge counter from this artifact. If you do, you gain 1 life.

Iron Myr

Manabarbs

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