Grunker
RPG Codex Ghost
How is it a tempo loss when you end up with the same amount of cards in hand and one more resource to spend on 'real' cards? I guess cause it needs 3 fortune, but even so.
I assume that we are not debating the relative strengths of the cards, right? +1 mana with a cantrip would be auto-include in MtG, that much is a given, and the card is hardly played at the top-end in Duel of Champions.
The reason for that is the 3 fortune and the tempo. The tempo comes from the fact that Campfire "sort of eats a card" in the way that while you're competing for battlefield control with your opponent, which is the crucial beginning point of any Duels match, Campfire does nothing. Later when you build up to 3 fortune, you might have lost control of the game because you have a Campfire where there could be an awesome creature. Drawing that awesome creature with Campfire now won't help you since now your opponent will have 3/1 rows locked down to his advantage, meaning playing one will play right into him.
Campfire is a good card in control decks that are meant to manage the fact that they're greedy. Overall they aren't played at all though. That speaks volumes about how tempo-focused Duel of Champions is compared to some other choice TCGs.