Life is a resource
This iconic black cards lets you draw a card on your upkeep at the cost of 1 life
Phyrexian arena
For just 1 black mana this instant dystroys target artifact for 5 life
Vendetta
this 3 mana artifact lets you pay 1 life to untap target creature
umbra mantle
this 4 mana sorcery lets you swap your total life with the cards in your library
Peer into the abyss