Planar Collapse [Urza's Legacy]

Planar Collapse [Urza's Legacy]Set: Urza's Legacy Type: Enchantment Rarity: Rare Cost: {1}{W} At the beginning of your upkeep, if there are four or more creatures on the battlefield, sacrifice Planar Collapse and destroy all creatures. They can't be regenerated. With heavy heart, Urza doused one world's light to rekindle another's.

Set: Commander 2014 Type: Creature — Dragon Rarity: Rare Cost: {5}{R}{R} Flying

create a 2/1 blue Phyrexian Myr artifact creature token

From Gaea grew the world

you may gain life equal to that creature's power

They became a single entity

Lifespans are measured by its dreadful length

Loyal Gyrfalcon loses defender until end of turn

" —Handel

Set: Champions of Kamigawa Type: Sorcery Rarity: Uncommon Cost: {2}{B}{B} Target opponent reveals their hand

then let me

Set: Commander Anthology Type: Sorcery Rarity: Rare Cost: {5}{G}{G} Each player sacrifices all artifacts

where X is the number of creatures that died this turn