It's a fantasy role-playing game.

DM: You are Keyleth, a half-elf druid . You are the member of the famous group of adventurers. Previously, Being the adventurers they are, they took it upon themselves to leap out into the forest of the Vesper Timberland, found and hunted down this hydra, fought it, and upon slaying it discovered that there was another group also hunting this hydra. An actually sanctioned group, and hunting this hydra is considered illegal in Vasselheim unless you had actually been contracted to do so.
DM: There are many that sell jewelry, many that sell very well-made clothing, some of them party attire, there are some that sell exotic fruits that have been imported in various states of ripeness.
Player: Is anyone selling any masks?
DM: Make a perception check.
Player: Passive or active?
DM: That would be an active perception check as you're seeking it.
Player: 21.
DM: 21. You do glance around and there is one cart that carries costume, party attire supplies. It doesn't seem to have too many customers right now, but they do have a couple of masks that are on display.
Player: Are there any masks that look like tiger masks?
DM: Looking at it, there are none that are tiger-specific, no. They seem to be molded leather and some more impish, goblin-y in appearance.
Player: Is there someone working the stand?
DM: There is, yes. You see a woman in her forties or so, thin, with a big toothy smile. Her hair is pulled back into tight bun. You can see there's little bit of her blondish hair turning to gray on the sides around her ears, Reed Richard-style.
