Without a specific plan you are essentially either making an aggro deck or a midrange deck if you plan on using a tribe that has no combo elements or that is able to mimic other good non-tribal archetypes game plan
As Im sure you are all aware, Wizards recently released their third Secret Lair deck entitled Angels: They are Just Like Us but Cooler and Have Wings, and while this title is categorically an untrue statementyou may have heard me expound upon angels lack of humanity and why it makes them so interesting on Casual Magic with Shivam Bhatt in the pastthe deck itself was honestly pretty cool
Check out the Gods later at #3 to see why)
You will need to contact your local Pokemon League to learn more about their Pokemon Day plans, if any
However, Sigurd is truly at home in a deck stacked with Sagas thanks to his boast ability which allows him to either add or remove a lore counter from a Saga in play
In general, using Magosi, the Watervei in this case is bad idea