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
This Jace isn't even close to top-tier anymore, but it's still talked about as though it's an unbeatable planeswalker
Divining the future is easy when you hold the power to sway it
Dorks that don't do much else other than be fat have to be really good to make the cut and while this is the required power for such things it is quite narrow and so not highly rated on those two accounts
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)
Additionally, if Cloud is equipped, the creature's abilities or equipment cards trigger an additional time, which WotC teases will have an effect on the iconic Buster Sword