Myr Battlesphere

When Myr Battlesphere enters the battlefield, create four 1/1 colorless Myr artifact creature tokens.
Whenever Myr Battlesphere attacks, you may tap X untapped Myr you control. If you do, Myr Battlesphere gets +X/+0 until end of turn and deals X damage to the player or planeswalker it’s attacking.

Time Sieve

, Sacrifice five artifacts: Take an extra turn after this one.

Buried Ruin

: Add .
, , Sacrifice Buried Ruin: Return target artifact card from your graveyard to your hand.

Kazandu Refuge

Kazandu Refuge enters the battlefield tapped.
When Kazandu Refuge enters the battlefield, you gain 1 life.
: Add or .

Pitfall Trap

If exactly one creature is attacking, you may pay rather than pay this spell’s mana cost.
Destroy target attacking creature without flying.

Temporal Mastery

Take an extra turn after this one. Exile Temporal Mastery.
Miracle (You may cast this card for its miracle cost when you draw it if it’s the first card you drew this turn.)

Copper Carapace

Equipped creature gets +2/+2 and can’t block.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Time Sieve

, Sacrifice five artifacts: Take an extra turn after this one.

Armillary Sphere

, , Sacrifice Armillary Sphere: Search your library for up to two basic land cards, reveal them, put them into your hand, then shuffle your library.

Wargate

Search your library for a permanent card with converted mana cost X or less, put it onto the battlefield, then shuffle your library.

Kazandu Refuge

Kazandu Refuge enters the battlefield tapped.
When Kazandu Refuge enters the battlefield, you gain 1 life.
: Add or .

Armillary Sphere

, , Sacrifice Armillary Sphere: Search your library for up to two basic land cards, reveal them, put them into your hand, then shuffle your library.

Vial of Dragonfire

, , Sacrifice Vial of Dragonfire: It deals 2 damage to target creature.

Heart-Piercer Bow

Whenever equipped creature attacks, Heart-Piercer Bow deals 1 damage to target creature defending player controls.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Izzet Steam Maze

Whenever a player casts an instant or sorcery spell, that player copies it. The player may choose new targets for the copy.
Whenever you roll , instant and sorcery spells you cast this turn cost less to cast.

Mount Keralia

At the beginning of your end step, put a pressure counter on Mount Keralia.
When you planeswalk away from Mount Keralia, it deals damage equal to the number of pressure counters on it to each creature and each planeswalker.
Whenever you roll , prevent all damage that planes named Mount Keralia would deal this game to permanents you control.