Like Dance Off, this trick is a good way to fill the lanes with fighters (mushrooms) quickly for Buff-Shroom or Punish-Shroom to take effect. But generally, this trick, if used in the first round, can deal either 2 damage to the hero or block a zombie and deal 1 damage to the hero, provided that neither of the Button Mushrooms have been destroyed before engaging in combat.
Since this trick counts as playing 2 plants, it synergizes well with Muscle Sprout. However, no hero can have More Spore and Muscle Sprout at the same time, unless they get it from Seedling.
Due to it only spawning Button Mushrooms instead of Puff-Shrooms, it is a bad idea to use this when there are less than 2 lanes that are empty, since they do not have team-up.
Against
This will not exactly help the plant hero unless Punish-Shroom is on the field, which will cause either some of your zombies to be low on health or have your hero take plenty of damage. If the plant hero uses this on the first turn, it is possible that you will have to accept taking 2 damage, unless you have a zombie in one of the Button Mushroom's lanes.
Gallery
More Spore's statistics
Card
Ability when played
Old
More Spore's statistics before update 1.2.11
Old card
Trivia
Its card description is a reference to the popular idiom "one good turn deserves another."
Its name is an example on rhyming.
It was possible to trigger Punish-Shroom's special ability by playing this trick as this, along with Doom-Shroom, counted as a mushroom being 'destroyed'. This has been removed in an update.