Wayward Swordtooth's middle ability is cumulative if you control more than one
The blocking creatures all deal their damage to the attacking creature together
All you have to do is fill this bad boy with as many wheel effects as possible and use some hand disruption, some board wipes, and some other nonsense, and youve got a very specific and annoying control deck
Some people might have to buy 2
Galadhrim Ambush Galadhrim Ambush is a very similar card to Arachnogenesis, and it'll probably be a green staple in EDH, particularly in elf decks
Shinryu's unique effect, Burning Chains, can come in handy in the multiplayer Commander format, though this may cause other players to focus their attacks on Shinryu and its user