It's a fantasy role-playing game.

DM: You are Pike Trickfoot, a gnome cleric . You are the member of the famous group of adventurers. Previously, There, they find a cave filled with magical darkness. Keyleth shifts into an earth elemental to scout the cave, finding that it contains a strange planar rift and a group of grick.
DM: You're moving slower than that because you're pulling it, towing the entire boat behind you, so you're going 20, but you're putting distance between you and the creature, for the rest of the party, which makes it harder for it to catch up. All right, that brings us to Pike!
Player: Okay! I'm going to send a Guiding Bolt to the flying manta ray. So, I have to roll and see if it hits?
DM: Yes. Add your spell modifier to it. Oh, you found your sheet?
Player: Yeah, I did.
DM: Awesome.
Player: It doesn't hit. It's 12.
DM: 12 does not hit, unfortunately. Once again, you fire and you think you hit one of them, but it seems to hit one of the group of three that's now flying overhead, and one shimmers and vanishes, seemingly unaffected by the bolt, but that one image of it disappears.
Player: Can I do anything else? Since I'm just sitting.
DM: No, not unless you want to move somewhere in the boat.
Player: No. Dang it!
DM: All right. It's now its turn. It is going to move. It gains up on the boat to about there. It actually gets a little lower. It's starting to gain on you guys, make its way (shh) gliding down towards the front, and you see now there's now two of them side by side that are coming down towards you guys.
