Reported to be part of a single sheet, clamped and cut, which were originally used to test how well the gloss coating would adhere to the hologram on the reverse
MTG these days has too many ETB creatures and synergies with enter/leaving the battlefield
Valuable set cards include First Edition Shadowless Charizard, First Edition Neo Genesis Lugia, and Gold Star Rayquaza
You can recover one of your dragons that got removed, or you can consistently degrade all of your opponents turn after turn
You can get bits and pieces of what Confinement does from Ivory Mask, Story Circle, and Energy Field, but there's only one purveyor of this fine package of protection
The Brothers War is one of the very best sets in MTGs recent history