Sapling of Colfenor attacks and you draw a card and gain some life in the process as long as you put creatures with higher toughness than power in your deck, which youre already doing anyways
Whenever he or another of your creatures dies, you can grab a creature with lower toughness from your graveyard and add it to your hand
The shafts I used were made for these O-rings (on amazon.ca): uxcell Silicone O-Ring, 18mm OD, 12mm ID, 3mm Width, VMQ Seal Rings Gasket, White, Pack of 10 MTG_Shuffler_Shaft_v2 are the re-designed shafts with grooves to hold o-rings (the amazon link above) - if you print these, then don't print the shafts in the card.shuffler.v3mrb-parts.3mf file (right click on them and uncheck printable) nor the card.shuffler.shaft.rubber-band.3mf file if you're using small rubber bands, print the card.shuffler.shaft.rubber-band.3mf file (resized from the previous model) lastly, the shafts in the card.shuffler.v3mrb-parts.3mf don't have a groove, and could be plasti-dipped or used with U-shaped seals that wrap around the disc I was more comfortable in Fusion360, so I used it for the redesigned shaft (o-ring variant)
By the by, she's also one of the engines that makes my Equinaut deck run, so I have played a veritable ton of cards with her over the years in the same deck
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