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A triggered mana ability is one that could add mana and triggers on an activated mana ability

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If your opponent ramps into an early planeswalker, then you can finish it off using Purphoross Intervention's second ability, and if there are no blockers on the opponent's side, then use the first ability to finish them off

For this example, let's use Serra Avatar, a beloved finisher for casual decks

Strionic Resonator will tap with two mana and then copy any triggers above like ETB stuff or my upkeep triggers or The Ninth Doctor

If thats a card like Doomskar Titan or Cinderheart Giant, the game will often end on the spot