Altanak's second ability resolves before the spell or ability that caused it to trigger. It resolves even if that spell or ability is countered or otherwise leaves the stack without resolving.
2024-09-20
If a spell or ability targets Altanak more than once, its second ability still triggers only once.
Trample
Whenever Altanak becomes the target of a spell or ability an opponent controls, draw a card.
, Discard this card: Return target land card from your graveyard to the battlefield tapped.
