Gempalm Incinerator
Creature — Goblin
Cycling 
(, Discard this card: Draw a card.)
When you cycle Gempalm Incinerator, you may have it deal X damage to target creature, where X is the number of Goblins on the battlefield.
Illustrated by
Duel Decks: Elves vs. Goblins#37UncommonEnglishLegality
Rulings
The target of the ability can’t be a creature with Protection from Creatures, with Protection from Goblins, or with Protection from Red.
Cycling is an activated ability. Effects that interact with activated abilities (such as Stifle or Rings of Brighthearth) will interact with cycling. Effects that interact with spells (such as Remove Soul or Faerie Tauntings) will not.
When you cycle this card, first the cycling ability goes on the stack, then the triggered ability goes on the stack on top of it. The triggered ability will resolve before you draw a card from the cycling ability.
The cycling ability and the triggered ability are separate. If the triggered ability doesn’t resolve (due to being countered with Stifle, for example, or if all its targets have become illegal), the cycling ability will still resolve and you’ll draw a card.
You can cycle this card even if there are no targets for the triggered ability. That’s because the cycling ability itself has no targets.