Card effect issue
I was playing MTG: Arena and I used the card "Prison Sentence" against "Urabrask" and its abilities were still being activated even under the effect of "Prison Sentence". I.E. I was still taking damage of its effect whenever the opponent casted sorcery or instant. I'm attaching the log for futher help.
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[Deleted User] commented
That is a TRIGGERED ability, not an activated one. Urabrask does have an activated ability, though, it's the one that makes it transform.
Triggered abilities always use the words "when", "whenever", or "at" to phrase their trigger condition. And when it's met, the ability goes on the stack automatically.
Activated abilities, otoh, always use the template [cost]:[effect]. Look for the colon. This template has to be there, either in the card's text itself, or in the rules for the keyword ability, to make an ability an activated ability. Activated abilities must deliberately be activated by a player, and the cost must be paid up front like a spell.
If an ability doesn't fit either criteria, then you are dealing with a static ability.