Magneto

Magneto is a passive item.

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.
 * 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.
 * Sacks are not attracted by Magneto.
 * A few enemies (like the Horf) are drawn toward Isaac as well.

Interactions

 * : Magneto cuts the momentum of the hearts, allowing for easy pickup and, in turn, making Isaac very tough to kill.
 * /: Attracts hearts and coins dropped by enemies, allowing for an easier survival and/or coin mongering respectively.

Trivia

 * The item's name may be a reference to the X-Men villain, Magneto.
 * This item's coloration and placement on Isaac's head may be a nod to Magnet Man, a villain from the early Mega Man games (noticeably Mega Man 3).
 * Despite what the description says, Magneto will not attract passive or active items.

Seeds
SXMP T4YJ 46Q7 YPND (Treasure Room adjacent to first long room)