There are at least two threads for combos on the forum, but the two I found with a quick Search are both from 2015, so I think we should have a new one.
I haven’t tested this yet, but based on text of the cards, I’m pretty sure that this should work. Guise plays Gritty Reboot, then activates Tough Choices, choosing “Play a Card”. He plays I Can Do That Too and uses the “Bring It” power of Road Warrior Void Guard Mainstay. Tough Choices then allows Guise to deal 1 damage to any target… choose himself. If this works as I expect, he will hit himself for 1, then because he hit himself for 1, he can choose to hit himself for 1. Lather, rinse, and repeat until his HP is down to 1, drawing 26 cards along the way. Bonus points if Mainstay then plays Leader of the Pack, ensuring that literally any source of damage that would hit Guise gets redirected to Mainstay, ensuring the 1-HP Guise never gets hit again.