Who would've thought that one day Wizards of the Coast decide to print a card that is stronger than Abrupt Decay, a staple removal spell for both Modern and Legacy formats. But here is Assassin's Trophy -- a card you will see in many top-tier decks.
This archetype is an obvious choice! You can safely replace all your copies of Abrupt Decay with Assassin's Trophy, and you will have a far superior removal spell on your hands than ever before.
The same goes for the Abzan archetype that also tends to run several copies of Abrupt Decay in the main deck. Well, not anymore!
And let's be honest, any other deck that runs black and green will want to have Assassin's Trophy as a part of their lists, even such decks like Humans or BridgeVine.