It's a fantasy role-playing game.

DM: You are Vex Vex'ahlia, a half-elf ranger . You are the member of the famous group of adventurers. Previously, They stumbled upon a small hive of basilisks that surrounded an obelisk of Ioun, which gave them their first clue as to the location where this sphinx could be found. They battled the basilisks, destroyed their underground hive, or at least the exit from it, via Fireballs and Stone Walls and other such endeavors.
DM: 17. Trinket crushes the other orc who'd already been softened up from the blow from Keyleth's earth elemental.
Player: Yes, good job Trinket!
DM: As Trinket rolls past, you can see this crushed form of the orc on the ground in the snow, crushed in place.
Player: Good job, buddy!
DM: Most of the bones broken and turned to dust. The third one, however, sidesteps and is going to go ahead and take a swing at Trinket. That is going to be a 19 to hit.
Player: 20!
DM: 20. Right across the top of Trinket's armor, no effect.
