Its controller can toss a coin once per turn and call how it lands - guessing correctly will destroy all the opponents monsters, but guessing wrong will destroy all the player's as well as take half of their combined ATK points
The strategy with this card was to combine it with effects such as Dark Hole that can destroy your own monsters, then search out those combo pieces whenever you need it
TCG official support app
monsters you control cannot attack your opponent directly for the rest of this turn, except this card, also for each Material detached, take control of 1 opponent's face-up monster until the End Phase, but while this effect is applied, they have their effects negated, their ATK's become 4500, also their names become "Neo Galaxy-Eyes Cipher Dragon"
Making their first appearance in Yu-Gi-Oh
Metalfoes Fusion Drawing cards is always welcome in a game where players are prepared to give up half their deck just for an extra draw