This opens slots up for more generically powerful cards, making the deck powerful with Stella in play, but not reliant on her to function
This set also sees the return of the original lowcase ex card type as well as the debut of the Terastal ex card type that will replace Vs and VMAX as Ultra Rares
The first of those is cost reduction, and the second is when a card allows you to take extra turns
It's a slow, annoying way to lose, which is why stall decks are frowned upon
In addition, it is very easy to trade knockouts favourably since my attackers are usually OHKOing my opponents Pokemon but very rarely get OHKOed in return (especially with Pot Helmet)
This makes the card with the Blocker ability the target of the attack, rather than the one that the attacker declared