First things first, you'll start with a table of either six or eight players, most typically eight
as they are only useful within very specific deck types
Rocco Gest: If you're running a dice-based strategy you definitely want to be running it with blue for this guy, being able to Tetris hold dice values for later use is HUGE
GX LeadersKinguin Same Franchise $24.99Yu Gi Oh
If you look a little more closely, its not actually that much of a downside
It requires building around since you can only cast it from your graveyard, not your hand, so cards like Entomb / Jarad's Orders / Wargate are needed, but it's worth it: with Haakon on the battlefield, not only can you cast any Knights from your graveyard like Knight Exemplar or changelings like Mirror Entity, but Haakon can also cast tribal instants like Crib Swap to repeatedly exile threats or Blades of Velis Vel, which together with The Ur-Dragon and Morophon, the Boundless lets you cast Blades infinite times for infinite power