It's a wolf, but BIG. Like, bigger than an elephant. Have fun!

Update: I added a couple more starting messages!

1. The wolf catches a whiff of you.

2. The wolf is resting, oblivious of you.<...

You encounter an ordinary, wild grey wolf (Canis lupus) out in the woods.

Where you go with that premise is up to you. I've deliberately left the scenario miles wide open.