In some ways, the release of War of the Spark and its impact on Modern are a good reminder of why people love Modern so much: you can play just about anythingfrom Niv-Mizzet Reborn to Spark Doubleand, with some practice, tight play, and matchup luck, end up with a winning deck
The Camouflage ability breaks the card in half, providing a source of +1/+1 counters to make Spider-Man massive while keeping you insulated from targeted removal thanks to hexproof
These famously intractable effects are just plain broken
If it shows good results in Modern, especially in Sultai Control decks, then this will further drive up the price
Crucially, starting an engine is a state-based action that happens as soon as you control a permanent with the ability, making it exceptionally difficult for an opponent to interact with via the stack