Sigil of Wrath

Indestructible, Hexproof
At the beginning of each upkeep target creature gets +X/-X Deathtouch,
Trample, and Infect until end of turn
where X is the creature's toughness -1
if you gained more than 5 life at the end of
each upkeep transform Sigil of Wrath
(see sigil of peace)