mtg cards like heartstone This effect cant reduce the mana in that cost to less than one mana. MTG Heartstone Premium Deck Series:

But it also has some of the most powerful words in the game in its text box, untap all lands you control. They did make sure to balance this so it isnt completely busted

It turns non-creature artifacts into creature artifacts, and vice versa

Magic: The Gathering

Still though, a sealed booster box of this set will set you back a cool $3,000 and with good reason thanks to notable chase cards such as the eminently powerful ramping tool Grim Monolith, the Squirrel kindred powerhouse Deranged Hermit and artifact recursion machine Goblin Welder

Pulling teeth, the card, excels because even though we think were looking at an image conceived just to make us feel sick, we may very well just be looking at a correct depiction of the point of view of a dentist from medieval times