A couple more that might have some potential.
Grixis Sojourners
1ubr
Creature - Zombie? Common
When you cycle Grixis Sojourners or it's put into a graveyard from play, you may remove target card in a graveyard from the game.
Cycling 2{B}
#112/145 4/3
A lot better than Cremate (if some still use that) and Rapid Decay. The creature can be reanimated and still has a decent body if you ever NEED to cast it.
The blue one that taps or Untaps with Cycling is cute, but with no body it's probably just a free Twiddle cantrip that doesn't take a spell, not impressive. The 3 other cyclers are crap.
Behemoth Sledge
1gw
Artifact - Equipment Uncommon
Equipped creature gets +2/+2 and has lifelink and trample.
Equip 3
Those who worship the great gargantuans could hardly be expected to fight with subtle weapons.
Illus. Steve Prescott #65/145
Loxodon Warhammer has been awesome in the Stack, probably the best equipment (Dragon's Fang doesn't count). Does the same thing, but probably too much the same.
Predatory Advantage
3rg
Enchantment Rare
At the end of each opponent's turn, if that player didn't play a creature spell this turn, put a 2/2 green Lizard creature into play.
As said, enchantment are hard to remove and people don't cast creatures that often, this guy thing can pump 2-3 tokens per turn for a while.
Mage Slayer
1rg
Artifact - Equipment Uncommon
Whenever equipped creature attacks, it deals damage equal to its power to defending player.
Equip 3
For creature heavy stacks, double the damage of any attacking creature in direct damage. Still probably too weak though.