The card provides a powerful token doubling effect, so anything that makes strong tokens is a great inclusion
Bosh, Iron Golem Bosh, Iron Golem is a classic commander, but a little over-costed
One drawback is that your opponents have more combined life than you have cards in your deck, so it's possible to deck yourself out if you hit a combo too early or without a way to throttle it
However, the next set for the Disney game, Ursulas Return, will feature cards that will allow players to Shift their characters without paying an ink cost
Blue is also one of the most interactive colors, and most blue decks will have at least one answer ready to go when things go sour
There's a decent bit of power to be enjoyed in Death Toll but its lack of variety and clunky synergy make it noticeably weak in comparison to the other three MTG Duskmourn Commander precons