As you're stacking up energy to use the Dark Prism attack, you deal damage to your opponent
These legends are so bad, they're more in line with cards from the set Legends itself than they are other legendary creatures that already existed at this time
Lavalval Dragun X FIRE Level 6 [ Dragon / SynchroEffect ] ATK 2500 DEF 1200 1 Tuner + 1 or more non-Tuner FIRE monsters Once per turn: You can add 1 "Laval" monster from your Deck to your hand, then send 1 "Laval" monster from your hand to the Graveyard
Ultimately, if you want to participate in tournaments, then English cards are the way to go
Dedenne ex [P][P] Tail Swap: Move all damage counters from 1 of your Benched Pokmon to your opponent's Active Pokmon
Lands tapping for every color is a heck of a boon for anything playing three colors or more, to say nothing of how good playing two lands a turn obviously is