Magneto

Effects

Pickups (e.g. hearts, coins, keys, bombs, etc.) are attracted to Isaac.
- The attraction enables the item to pass/fly over pits or rocks, but not through Key Blocks.
- Hearts are only attracted if Isaac could pick them up with his existing Red Heart containers.
- Batteries act similarly to hearts in that they will only be attracted to Isaac if his active item isn't fully charged.
- (Added in Repentance) Chests roughly 2 or fewer tiles away from Isaac open automatically. Spiked chests are opened without damaging Isaac. Locked chests and stone chests are not opened and still require a key/bomb.
A few enemies (like the Horf) are drawn toward Isaac as well.

Magneto can attract (Added in Afterbirth †) Scared Hearts, but they still run away from Isaac.
(Added in Repentance) Sacks are not attracted nor opened by Magneto.
(Added in Repentance) If Magneto opens the chests in (Challenge Room) Challenge Rooms, the waves won't start spawning, nor the way out will be closed.

(Added in Repentance) Hypercoagulation: Magneto cuts the momentum of the hearts, allowing for easy pickup and, in turn, making Isaac very tough to kill.
(Added in Repentance) Options?: If a chest is presented as a choice and opened by Magneto, the other reward won't disappear unless the empty chest is then touched. Chests with items disappear or make the other reward disappear, though.
(Tainted Magdalene) Tainted Magdalene/ (Tainted Keeper) Tainted Keeper: Attracts hearts and coins dropped by enemies, allowing for an easier survival and/or coin mongering respectively.