Portal to Phyrexia [The Brothers' War]

Portal to Phyrexia [The Brothers' War]Set: The Brothers' War Type: Artifact Rarity: Mythic Cost: {9} When Portal to Phyrexia enters the battlefield, each opponent sacrifices three creatures. At the beginning of your upkeep, put target creature card from a graveyard onto the battlefield under your control. It's a Phyrexian in addition to its other types. After five thousand years, the nightmare returned.

When summoned elsewhere they can be quite destructive in search of food

target opponent loses 3 life and you gain 3 life

[3] Ethereal Flame (30+)

Set: Magic Origins Prerelease Promos Type: Creature — Human Knight Rarity: Rare Cost: {W}{W} First strike

Set: Portal Type: Sorcery Rarity: Common Cost: {R} Scorching Spear deals 1 damage to any target

{T}: Aladdin's Ring deals 4 damage to any target

if there are no Battle Cards in play in your opponent's Battle Area

Set: Shadows over Innistrad Type: Creature — Devil Rarity: Rare Cost: {2}{R} Menace

Set: The List Type: Legendary Creature — Eldrazi Rarity: Mythic Cost: {15} This spell can't be countered

Set: Mystery Booster Type: Legendary Artifact Creature — Scarecrow Rarity: Rare Cost: {2/W}{2/U}{2/B}{2/R}{2/G} ({2/W} can be paid with any two mana or with {W}

target attacking creature connives X

or where you will feel absolutely nothing