If at any point you happen to have more than one copy of this spell in play, destroy copies immediately until you have only one left on the board.

At the beginning of the turn, this spell inflicts all its damage at once. Thus having 3 Trees on the board will inflict 6 damage instead of 3 times 2 damage.

This spell counts every Tree on the board. This also includes components as well as Trees on the opponent's side of the board.

If you're a Mage Noir, "King of Trees" doesn't make itself apply its effects one more time. (Nice try on that infinite loop, but that would have been a bit too easy don't you think?)

If you're a Mage Noir and also control "Animated tree", "Animated tree" will discard a single seed since only one was needed to cast it. However, it will hit twice and bring back 2 Seeds at the beginning of the turn.

If you're a Mage Noir and also control "King of trees", preparing "Tree in flames" costs no components. Moreover, it hits twice at the beginning of the turn, but also loses 2 HP.