[Regarding the Pendulum Effect "Once per Chain, if a monster(s) is destroyed: Place 3 counters on this card."[1]
It starts a Chain and activates in the Pendulum Zone.
It is mandatory to activate.
[Regarding the Pendulum Effect "This card's Pendulum Scale is increased by the number of counters on it."[1]
It does not start a Chain and applies in the Pendulum Zone.
[Regarding the Pendulum Effect "You can remove 12 counters from this card; Special Summon it."[1]
It starts a Chain and can be activated in the Pendulum Zone.
[Regarding the text "Cannot be Normal Summoned/Set. Must be Special Summoned by its own Pendulum Effect."[1]
It is not treated as a card effect.
[Regarding the text "You can only Special Summon "Veda Kalarcanum(s)" once per turn."[1]
It is not treated as a card effect.
[Regarding the monster effect "Once per turn, if your opponent Special Summons a monster(s) from the Extra Deck (except during the Damage Step): You can banish 12 cards from your hand, field, and/or GY, face-down; it becomes the End Phase of this turn."[1]
It is a Trigger Effect that can be activated in the Monster Zone.
It cannot be activated during the Damage Step.
[Regarding the monster effect "Once per turn, during your Standby Phase: Return this card to the hand, then you can Special Summon 1 of your "Veda" monsters that is banished or in your hand, Deck, or GY."[1]
It is a Trigger Effect that activates in the Monster Zone.
It is mandatory to activate.
When resolving this effect, return this card to the hand. Then, if this card successfully returned to the hand, you Special Summon 1 of your "Veda" monsters from your hand, Deck, GY, or that is banished.
Returning this card to the hand and Special Summoning a "Veda" monster do not occur simultaneously.