one piece tcg kaido deck OP05-118 Card Game Card deck and set it as active Official starter deck lists :

The Soul Stone Even without all the harnessing and sacrifice text, The Soul Stone would be playable purely as an indestructible, untapped mana rock for 2 mana

She also has Rope Dart, which lets you tap two untapped artifacts you control to deal 1 damage to each opponent

Well, almost all creatures, that is

With other complementary artifact mana sources like Thran Dynamo and Grim Monolith, decks could count on being able to get the kind of mana you'd need to justify packing the cards that would let you use the mana from Metalworker to deliver the knockout blow, and their presence lets you turn that Metalworker mana into permanent giant amounts of mana rather than just a one shot deal

answered Sep 21, 2011 at 13:26 According to DCI Level 2 Judge "Natedogg" the loyalty counters from the front face transfer to the back face

To make up for that, however, it also tacks on Toxic 1, allowing you to bring Poison counters into the game if your deck could take advantage of that