Seeker

Seekers, in Celeste, are hostile monsters which fly towards Madeline on sight, attacking her. Seekers, like spikes, kill on contact; however, like snowballs, Madeline can jump on a seeker in order to temporarily disable it. When a seeker reactivates, it produces a ring of momentum around it, which can be used to gain speed or traverse long distances. Seekers can destroy special seeker blocks, red-colored blocks found solely in Unraveling-onwards Mirror Temple. Seekers can be permanently killed only by crushing them, e.g. using swap blocks. Seekers are unable to see through barriers and will never attack Madeline if she is standing in or at the other side of a barrier; however, they can still kill Madeline on contact.