An ability of the equipped creature or an emblem you own that triggers when a creature "leaves the battlefield" will trigger twice if that creature leaves the battlefield by dying
In fact, the first appearance of a gnome in Magic was as a red creature in Legends (Quarum Trench Gnomes I know, not the most auspicious beginning)
Maybe it was a big bad with a need for metal hand prosthetics
Inalla, Archmage Ritualist Inalla, Archmage Ritualist makes great use of the eminence mechanic
Whenever it deals damage, you can throw away your hand and draw equal to the number of artifacts you control, which, as any self-respecting cheerios player would know, simply means "discard nothing, draw your whole deck"
Every time this card does combat damage to other players, you can choose to exile any of your nonland permanents and return them back into play, also retriggering their ETB abilities