Gibbering Fiend [Shadows over Innistrad] Astral Pack 4 Now all they needed was

Now all they needed was a jolly

You can only activate 1 "Spellbook of Power" per turn

neither player can Summon monsters nor take damage (but can Normal Set)

Set: Champions of Kamigawa Type: Instant — Arcane Rarity: Common Cost: {1}{U} Return target creature to its owner's hand

Whenever Shimmering Efreet phases in

Gibbering Fiend [Shadows over Innistrad] Astral Pack 4 Now all they needed wasSet: Shadows over Innistrad Type: Creature Devil Rarity: Uncommon Cost: {1}{R} When Gibbering Fiend enters the battlefield, it deals 1 damage to each opponent. Delirium At the beginning of each opponent's upkeep, if there are four or more card types among cards in your graveyard, Gibbering Fiend deals 1 damage to that player.