てながすいてんくなら
手長水天狗なら
te nagasu iten kunara

Noun
Da Copula

The "-nara" conditional form ("if/when…") of てながみずてんぐ

1. If/when one is a long-armed water imp:; If/when it's a long-armed water imp:

Nara Conditional
Usually Written in Kana