Equipped creature has base power and toughness X/X, where X is your life total.
Equip {5}
{"alchemy":1,"brawl":1,"commander":1,"duel":1,"future":1,"historic":1,"legacy":1,"modern":1,"oathbreaker":1,"oldschool":0,"pauper":0,"paupercommander":0,"penny":0,"pioneer":1,"predh":0,"standard":1,"standardbrawl":1,"timeless":1,"vintage":1}