I won my first prerelease

I've been playing magic for 2 about months, only Arena.

I went to The Hobbit pre-release and I was able to win it (3W - 1D - 0L).
I was shocked about it, was it just luck or this deck is actually good?

Deck is: https://moxfield.com/decks/5qAYj4yPgUyGgflfbxfHyg

I would say the best card I used more often are:

- Bilbo's Deadly Slice

- Gollum, Riddle Master

- Goblin Plate Mail

- Dwarven Mattock

- Dáin Ironfoot

- Crude Bent Blade