Spawning Pool [Urza's Legacy] Phyrexian Artificer each opponent who doesn't control

each opponent who doesn't control an Elf loses 1 life

and those are the ones that make me really nervous

Set: Magic 2010 Type: Sorcery Rarity: Uncommon Cost: {2}{U}{U} Tap all creatures target player controls

Set: Dragons of Tarkir Type: Instant Rarity: Uncommon Cost: {2}{G}{G} Up to two target creatures each get +2/+2 and gain trample until end of turn

Perhaps that's the point

Spawning Pool [Urza's Legacy] Phyrexian Artificer each opponent who doesn't controlSet: Urza's Legacy Type: Land Rarity: Uncommon Spawning Pool enters the battlefield tapped. {T}: Add {B}. {1}{B}: Spawning Pool becomes a 1 1 black Skeleton creature with "{B}: Regenerate this creature" until end of turn. It's still a land. (If it regenerates, the next time it would be destroyed this turn, it isn't. Instead tap it, remove all damage from it, and remove it from combat.)