Trample's reminder text during Ninth Edition was: If this creature would assign enough damage to its blockers to destroy them, you may have it assign the rest of its damage to defending player or planeswalker. The expression excess damage appeared in trample's reminder text during Magic Origins in 2015
Its even pretty great in flicker decks, to be honest
The target you choose to reanimate will exile itself if it dies again, but thats a small drawback to pay for this spell
Khans was a 3-color format which is still a tough ask for any Limited set, so most decks focused on two colors and splashed the third
All of them fit at least a few of the criteria given earlier in this article, and/or are the best option in that color for what they do
The topic of revenge always seems to end up with characters enacting vengeance, receiving their "just desserts" for what they've done to enact it