Then Will of the Sultai will let you either mill three and then return all lands - nasty good here, or toss +1/+1 counters on a dork equal to your land count and trample for a turn, and if you control your leader
When this card equipped with an Equip Spell card deals battle damage to your opponent double that damage." "(Quick Effect) You can discard this card
Pyroclasm is too puny for Commander, where pretty much everything is tougher than 2
Here are our favorites, including options from within and beyond Magic's own IP
However, Terror doesn't kill black creatures, protection from black creatures, untargetable creatures, or artifact creatures
Once all this has been accomplished, the game will give your opponent one last chance to stop you