Which Has the Highest Equip Cost
If they do, you draw a card and flip Prowl into Prowl, Pursuit Vehicle, which buffs itself with +1/+1 counters when other creatures or vehicles enter your battlefield
Playing into Innistrads horror atmosphere, Triskaidekaphile flips the script on the usually-unlucky number 13, allowing players who have managed to amass 13 cards in their hand to win the game outright
For the low cost of three mana, at the end of your turn, this 3/3 with menace can put a bounty creature on another creature
The Soul Stones harness ability is a bit overblown given the massive set-up cost, but it's all gravy on a massive upgrade to Charcoal Diamond, and an indication that the other colors will be getting some improved mana rocks soon enough, probably a few as early as Marvel Super Heroes next year