Fast forward to today and Bandai have just finished the pre-release of their 2020 version of the game with new, updated mechanics and what (so-far) seems to be a fun and interesting playstyle and resource mechanic which really pushes the risk-reward feel of the game
For something like this thing, 4000 could easily cut it whilst not being broken
Vengeful Bog Spirit X SPELL Continuous Monsters cannot attack the turn they are Summoned
As such, there are lots of cards that allow the player to draw more, but they tend to come with a heavy cost attached
"Everlasting Alloy" is another Quick-Play Spell that can negate effects targeting your Machine monsters, or prevent them from being destroyed by battle or card effect
This may not seem like a big deal but Woodland Sprites effect can be used infinitely on the players turn, and the Bamboo Sword cards allow players to get as many of these equip cards out as possible