Tainted Observer [Phyrexia: All Will Be One]

Tainted Observer [Phyrexia: All Will Be One]Set: Phyrexia: All Will Be One Type: Creature Phyrexian Bird Rarity: Uncommon Cost: {1}{G}{U} Flying Toxic 1 (Players dealt combat damage by this creature also get a poison counter.) Whenever another creature enters the battlefield under your control, you may pay {2}. If you do, proliferate. (Choose any number of permanents and or players, then give each another counter of each kind already there.)

If a card named Stomping Slabs was revealed this way

Set: Oversize Cards Rarity: Rare First strike (This creature deals combat damage before creatures without first strike

put twice that many of each of those kinds of counters on that permanent or player instead

Set: Champions of Kamigawa Type: Creature — Fox Wizard Rarity: Rare Cost: {3}{W} At the beginning of the end step

Set: International Collectors' Edition Type: Enchantment — Aura Rarity: Common Cost: {U}{U} Enchant land

" —Jalira

"What am I looking at

When the Boros Legion attacks

and an opponent may gain control of a creature you control of their choice for as long as Infernal Denizen remains on the battlefield

Set: Planeshift Type: Land — Lair Rarity: Uncommon When Darigaaz's Caldera enters the battlefield

Set: Alpha Edition Type: Artifact Rarity: Rare Cost: {2} {1}

Set: Portal Type: Sorcery Rarity: Uncommon Cost: {2}{B} Destroy all green creatures