Sigil Brush
Paints a sigil on a block face with the ink in your other hand. Dipped in water, it washes sigils off.
kinditemcreative tabFluxion
Currents
Gale3
Wing1What the Loupe reads: 4 in all. The game works them out from its recipes. Wheel of Currents
In the Codex
Entry Sigils — Command marks painted right onto blocks. Read an ink sac.