We shall endure." Commander, Legacy, Modern, Vintage Alchemy, Brawl, Competitive Brawl, Historic, Pauper, Pioneer, Standard, Timeless
Comeuppance is the source of the new damage, so the characteristics of the original source (such as its color, or whether it had lifelink or deathtouch) don't affect the new damage
If you reselect which player or permanent an attacking creature is attacking, that creature is still considered to have attacked the player or permanent as declared, but it is now attacking the new player or permanent
This isnt a mechanic we see every day, which makes these new designs intriguing right out of the gate