Savage Attacker

[Man_Over_Game]

Dunno about 4d10, but a lot of the CR 2 Beasts get one attack per turn that does massive damage. The quetzalcoatlus, for example, can do 6d6+2 damage with a single attack if gets the damage boost from Dive Attack.

For it to be eligible for Savage Attack, it can't be listed as "Extra damage" (like with Sneak Attack), it has to be listed as direct damage from the "weapon". I don't have the Monster Manual on hand, so I can't compare, but I just wanted to bring it up in case anyone was trying to make a build off of it.