Like last year's Ursula's Return set, this one is built around a recognizable Disney villain and even features another PvE Illumineer's Quest
With the introduction of Karn, the Great Creator from War of the Spark, its never been easier to acquire the artifact from your sideboard
The Invasion Tree has shattered the barriers between planes and the Phyrexian invasion of the Multiverse has begun
Fairer Prossh decks might go the route of Triumph of the Hordes to allow Prossh and/or your army of ankle biters to kill opponents with ease, utilize larger buffs like those offered by Return of the Wildspeaker to get the job done, or use Phyrexian Altar and Ashnods Altar to overwhelm the table with powerful spells
Trample, haste, annihilator 1 (Whenever this creature attacks, defending player sacrifices a permanent.) Hideous Taskmaster's second ability will resolve before Hideous Taskmaster does
There are not that many answers to this problem for decks not designed to handle it