Rocky Surface Cauldron - IOTA

The first Machine spell you cast each turn has cascade. (Whenever you cast a Machine spell from your hand, exile cards from the top of your library until you exile a nonland card that cost less. You may cast it without paying its mana cost. Put the exile cards on the bottom in a random order.)

When you cast a Machine spell with cascade, put a number of 1/1 counters equal to the mana value.

At the beginning of combat on you turn, you may
pay {2}{r/g} double the power of target creature you