This has to be a rule 0 discussion with your pod before you start playing mass land destruction
One of the best perks of Decidueye is that not only does it have a hefty amount of health, but it also can do a moderate amount of damage per turn
Four commons, two uncommons will happen 40% of the time
By the way, BGU mana cost is also quite fitting (at least for me), possibly representing Sin's connections to oceans (blue), death (black), and the natural cycle it's strangely bound to (green)
This commander shines with ETB card draw effects, and removal like Oblivion Ring that now exiles two permanents
Its not an adventure spell, but Uro is fantastic when your strategy is self-mill