When you cast the spell with Prowl, you look back at your turn to see if you've done what it says - dealt combat damage with a card that shares a type with the card with Prowl (so, probably a Rogue, but maybe a Dinosaur and in occasional corner cases, Goblin, Faerie, or Sphinx) You don't still have to control the Creature that did combat damage, you just have to have met the condition of dealing combat damage with the correctly-typed Creature
Keen-eyed readers may have already noticed that this card features the word golem. Golems are creatures from Jewish folklore, with one of their best-known stories, the Golem of Prague, dating back to the 16th century
Dont miss this opportunity to own a part of trading card history!
And I suspect these wont be the last ones either.
Worldgorger is a huge red Dragon that exiles all your other permanents when it enters, then returns them when it leaves
If you fail to draw your early-game ramp cards, you tend to suffer a pretty slow defeat