Lluwen by paying ({2} magic symbol) ({BG} magic symbol) ({BG} magic symbol) ({BG} magic symbol) , tapping it and discarding
Dakmor Salvage, creating a 1/1 Wurm creature token for each land card in your graveyard.
When the Wurms enter,
Doom Weaver's soulbond ability triggers that many times.
Resolve the first
Doom Weaver trigger, pairing it and a Wurm.
Holding priority, activate
Phyrexian Altar by sacrificing the Wurm that's paired with
Doom Weaver, adding ({BG} magic symbol) .
When the Wurm dies, it and
Lluwen trigger.
Resolve the Wurm trigger, instead choosing to mill two cards and return
Dakmor Salvage from your graveyard to your hand.
Resolve the
Lluwen trigger, untapping it.
Repeat steps 3 through 7 for each remaining
Doom Weaver trigger, instead drawing a card normally in step 6.
Repeat from step 1.
Notes
As you mill cards, inevitably more lands will end up in your graveyard, meaning you'll make more tokens over time. If you don't want to draw additional cards after resolving the first
Doom Weaver trigger, simply choose not to pair
Doom Weaver and the Wurm. If you create more than five Wurms, you can stop sacrificing them once you have sacrificed five of them.