THE COMMANDER Willowdusk, Essence Seer is an immensely powerful leader for the Witherbloom deck, but she also represents a departure from past Commander precon designs
Syr Konrad has it all
Without metalcraft, it merely taps a creaturebut once you control three artifacts, it upgrades into Swords to Plowshares without the lifegain
The extra combat is nice and all, and theres a potential infinite combo if you can make Bumi into a land (Ashaya, Soul of the Wild comes to mind), but untapping your lands is the reason to run Bumi
These two effects combine to make Nine-Fingers unblockable (Alpha Authority does this, too)
This is also why Wrenn and Six fit naturally into strategies built around multiple planeswalker commanders, where protecting incremental advantage engines matters more than winning quickly