Three Stun counters is a long time to lock down your opponents best creature, and having the flexibility to use it to play this is a "Suspend" creature that draws you two cards immediately makes this one of the more versatile offering in the set
All of the cards for the Heat Wave Arena main set can be seen below: Heat Wave Arena : Main Set Card List Of course, with the cards being in Japanese, it may not be immediately obvious what each one is
Outside of removal, there's other powerful spells like the game-ender Exsanguinate, and the value engine Lingering Souls, both of which work well with Y'shtola's abilities due to being greater than mana value 3 when cast
Weaknesses: [F] x 2 Resistances: N/A Retreat Cost: [C] How to Play: Sinistcha is great for spreading damage and unloading a massive hit
Keep in mind that market prices for individual cards fluctuate massively, so the exact value of each card will fluctuate over time
As someone who plays a lot of Commander, I have built many decks but not kept them assembled for long