Using Rainbow Pals Sky Dust in the Windsong Tunnel is one of the Day 2 tasks for the Veiled in Verses event in Infinity Nikki 1.6.

Beware its Blade is a limited-time quest that is available in Infinity Nikki 1.6. It is a World Quest that can be found in the Playful Chatter section of the Cherubic Moments event.