TrampleWhenever a creature or planeswalker an opponent controls is dealt excess noncombat damage, Toralf deals damage equal to the excess to any target other than that permanent.
A creature has been dealt excess damage if one or more sources deal more damage to it than the minimum amount of damage required to be lethal damage. In most cases, this means damage greater than its toughness, but consider any damage already dealt to it that turn.
(2/5/2021)
A planeswalker is dealt excess damage if it's dealt damage greater than its current loyalty.
(2/5/2021)
Even 1 damage dealt to a creature from a source with deathtouch is considered lethal damage, so any amount greater than that will cause excess damage to be dealt, even if the total amount of damage isn't greater than the creature's toughness. Note that a source of damage having deathtouch has no effect on damage dealt to planeswalkers.
(2/5/2021)
If a permanent is both a creature and a planeswalker, the minimum amount of damage to be considered lethal damage is used to determine if excess damage has been dealt. For example, if a 5/5 creature that's also a planeswalker with three loyalty counters on it is dealt 4 noncombat damage, it's been dealt 1 excess damage and Toralf's ability will trigger.
(2/5/2021)
It doesn't matter if a creature or planeswalker an opponent controls was dealt combat damage earlier in the turn. The only thing that matters is that the damage dealt to that permanent that caused excess damage to be dealt was noncombat damage.
(2/5/2021)
Toralf's ability doesn't affect the damage dealt to the creature or planeswalker an opponent controls. That damage will still be dealt as normal.
(2/5/2021)
The damage Toralf deals because of its triggered ability is noncombat damage. That damage may cause Toralf's ability to trigger again.
(2/5/2021)
The creature equipped by Toralf's Hammer is the source of the activated ability, but Toralf's Hammer is the source of the damage. For example, if the equipped creature is green, that ability can't target a permanent with protection from green. It could target one with protection from red, though the damage would be prevented as it would have been dealt by a red source (Toralf's Hammer).
(2/5/2021)
If the target is an illegal target as the ability tries to resolve, the ability won't resolve and none of its effects will happen. You won't return Toralf's Hammer to its owner's hand.
(2/5/2021)
You unattach Toralf's Hammer as part of the cost of activating the ability. If the ability doesn't resolve, Toralf's Hammer doesn't become reattached.