Straight out of the gate, Unrivaled Lethality doubles all damage that this card deals (and that can stack with double strike), not just combat damage, making it actually more like a 4/2 for three mana, but thanks to its next ability to easily get more counters when it deals damage to another creature which can quickly make this card a powerhouse
Rules 03/16/18 You cant cast Epic Confrontation unless you choose both a creature you control and a creature you dont control as targets
This card can counter all other spells, switch each creatures power and toughness until the end of the turn, or make all creatures unblockable until the end of the turn
You still get the cast trigger off Emrakul, the Promised End with this commander, so playing this on turn 3 might be good enough
Izo if your opponent cant remove him easily
Now, what will get played in the Command Zone more than this guy