This card is a little more niche than the other ones on the list because its ability relies on your deck utilizing the equipment mechanic
10 Atraxi Warden Six mana for a 6/6 flying creature is okay, but generally not enough on its own
Under 34 and you will mana-screw constantly
Kaalia of the VastKaalia of the Vast Decks:32,029 | Rank: 5 Also printed as part of the Commander 2011 product, Kaalia transparently does what so many other commanders try to emulate: She cheats out big, scary creatures without paying their mana cost
However, even if this can hit attacking, blocking, and tapped creatures, it's inability to get a creature out of the way before it blocks, and the fact it can't deal with things with more than 4 toughness make it too restrictive to be great