Halvar, God of Battle / Sword of the Realms This came out when WotC seemed to be trying very hard to make equipment matters a thing (and kinda did, to be honest)
This is done by both checking against any status conditions (more on that later) and discarding Energy attached to that Pokmon, equal to its Retreat Cost
Murders at Karlov Manor has a lot of flashy new tech for Commander, and a lot of very interesting new options to lead your decks
Usually it is split between: Creature Removal Artifact Removal Enchantment Removal Countermagic The number of suggested target removal cards are 6-12 with a range of 8-10 to be more popular and more to my personal liking
Of course, a fine play for seven mana tends to be back-breaking for four or five and luckily, thats how much I expect to regularly be playing this for
Now it's in seventh place, and here is why: This card is never never a dead card