Elements Unite! You will start the duel with 500 Life Points and your starting hand will be 1 card, which is "Gate Guardian". In addition, you will start the Duel with Suijin, Kazejin, and Sanga of the Thunder on the side of your field. Their effects are negated and they cannot attack as long as they are face-up on the field.
The Gate Guardian given to you by your skill will be all you need to stall so summon it immediately.
Tristan can deck out quickly because of needle bug nest, so we use a lot of draw effects in this deck. Shard of Greed, Legacy of Yata-Garasu, Jar of Greed, Good Goblin Housekeeping, Thunder Dragon, etc. helps you thin your decks quicker.
You can discard Thunder Dragon to search out 2 more copies from your deck then return one of the Thunder Dragon you searched to the deck with Good Goblin Housekeeping. You can then discard the Thunder Dragon in your hand to search the Thunder Dragon you returned to the deck.
During your final turn summon Gravekeeper's Vassal and activate Secret Pass to the Treasures and 3 Union Attack on him. Attack Tristan Directly to end the Duel.