Bouncy creatures (Shrieking Drake) Play without mana ("Free" spells) Storm Untap lands ("free" spells) When you play a spell
The saga creatures in general from FINAL FANTASY were huge flavor wins, as they're directly inspired by their video game counterparts
Marneus Calgar, in particular, could employ Hildibrand to strong effect
Hisuian Zoroark VSTAR [Lost Origin] and Tyranitar ex [Obsidian Flames] both could see a bit more success with some self-damaging Pokemon, and Ballistic Break has some nice synergy too
The addition of some new cards like Iridia, Red, and Team Rocket Grunt allows you to deal even more damage, remove energy from your opponents Pokmon and heal your Articuno EX
The expansion Surging Sparks saw the last trickle of cards with these mechanics before they were swiftly pushed aside for Trainer's Pokemon