Containment priest ability

[Tthmax]

Hi, i saw someone play an {exhume} and target à {tidespout tyrant} and his opponent targeting à {Containment priest}. His tidespout was alowed to stay. Is that because "if" is not under the triggered ability clause? It works with the valakut trick. As the mountains entering, trigger the valakut trigger even if it wasn't resolved at the time entering with the mountains.
À bit confusing.......

[particle]

Hi, i saw someone play an {exhume} and target à {tidespout tyrant} and his opponent targeting à {Containment priest}. His tidespout was alowed to stay. Is that because "if" is not under the triggered ability clause? It works with the valakut trick. As the mountains entering, trigger the valakut trigger even if it wasn't resolved at the time entering with the mountains.
À bit confusing.......

The thing is, {containment priest} is trying to prevent creatures from entering whereas {valakuut, the molten pinnacle} is reacting to seeing it enter. If {containment priest} was already on the field, the {exhume} wouldn't have its desired effect, but since they are entering at the same time, the priest isn't there to prevent it. Same for {show and tell}.

[Tthmax]

Thanks,

But it is a triggered ability right? I know About the 'when/whenever/at', but also know that 'as', for example {Phyrexian revoker} and {show and tell} shuts down a {griselbrand} on the spot because its not triggered.

Thanks again

[particle]

{valakuut, the molten pinnacle} is a triggered ability since it starts with "when." But {containment priest} says "if" meaning it's a replacement effect. It doesn't "trigger" it just replaces the original event.

[Tthmax]

Thanks, that clears it up!

[DrainCleaner]

Just for clarification, (Containment Priest}'s ability is known as a replacement effect rather than a triggered ability.

[Tthmax]

Thanks 👍