Shrines are structures that spawn rarely in certain biomes. They are used to spawn the legendary birds, Articuno, Zapdos, and Moltres. There are three types of shrines, one for each bird. Each of these shrines has a centerpiece that is modeled after its bird's wings, and when a fully-charged Orb of the corresponding type is placed in one, the matching legendary bird will spawn at level 70. The orbs can be charged by defeating 375 Pokémon, which do not have to be the same type as the orb. Each individual shrine can only be used once.