Historical Rules · 8 July 2022
Rule 603.2d
Official source text from the 8 July 2022 Rules release
An ability may state that a triggered ability triggers additional times. In this case, rather than simply determining that such an ability has triggered, determine how many times it should trigger, then that ability triggers that many times. An effect that states that an ability triggers additional times doesn’t invoke itself repeatedly and doesn’t apply to other effects that affect how many times an ability triggers.