Kellan, Inquisitive Prodigy // Tail the Suspect

Some spells and abilities that investigate may require targets. If each target chosen is an illegal target as that spell or ability tries to resolve, it won't resolve. You won't create any Clue tokens.

Some abilities trigger "whenever you sacrifice a Clue". Those abilities trigger whenever you sacrifice a Clue for any reason, not just to activate a Clue's activated ability.

The effect of Tail the Suspect that allows you to play an additional land is cumulative with similar effects. For example, on a turn where you cast two Tail the Suspects, you'll be able to play three lands.