Pikespells are introduced very late in the game; they're first seen in Evershade Forest with the introduction of the plant-elemental Timbercasts, with other variants being introduced later on. The ice-elemental Crystalcalf has its own Flipdeck.
Flipdeck Info (Crystalcalf)
A Crystalcalf is a form of Pikespell that has been enchanted with elemental ice. Long before they are seen, their presence can be felt as an eerie chill swirls through the air. Crystalcalves quickly strike with their mystical tridents to freeze foes in their tracks. Other Pikespell varieties include Pyrebell, Rainmaker, Gravelhoof, Galespear, Uddershock, Timbercast, and Lunacow. All of these Pikespells are under the complete control of the great wizard, Dudley.