­Goblin Artisans + Longship Raiders

Yow; the oracle text for that got nasty. Anyhow - when you cast an artifact; risk flipping a coin - draw a card if you win, lose the artifact if you lose.

And the vikings bring us more card filtering on a must attack creature.

Clearly; the goblins need to move into boat design.

Well, I like the card. Even if you need to drop the parenthesis and make the reminder text actual text. But I'm cool with the occasional wordy Goblin Artisans-y type card that does something flavorfull. I suppose this could just be an uncommon, too. It's a very good ability with Goblins.

You should probably remove the parens, indeed, but as an alternative you could remove the entire parenthetical restriction.

Technically, you can only activate the ability when you control an attacking creature, since you have to target it before you flip the coin.

What, goblin boats sink AFTER they reach land?

I really didn't want you to be able to deal damage and then sink (well, modulo first-strike anyway)

I thought after damage was dealt it was too late; you're not an attacking creature any-more?

For a brief moment you are. Normally nothing happens after damage is dealt during the combat damage step, but priority briefly flares up. You could activate the ability then.

Best wording: ": Flip a coin. If you win the flip, draw a card. If you lose the flip, destroy target attacking creature you control. Activate this ability only before the combat damage step. (Target the creature before flipping the coin.)"

Yeah... we don't see much interaction there because it is unintuitive, and Wizards shapes their cards to maneuver around it. But an attacking creature is still an attacking creature after it dealt damage, so long as we're still in combat...

Oh, by the way, it's a good rule to abuse in multiplayer as well. Next time an opponent attacks another player, try Rebuke-ing their creature after the combat damage is dealt, but while you are still in combat. ;)