Sigilum style can work in several ways. You can draw a symbol on the ground, or have the symbols pre-crafted, but only 3 as the load is quite heavy. It also takes time to make, more than vocem and motem. Once the sigil is crafted you can activate it any way you like and it performs its function. It is usually used for a wide spread area. Rin is a sigilum specialist so her style is quite interesting where as Rena is a motem specialist. 

Also now we will follow an order. I just need Rtron to post, than I will post, we will make that a heavy collab and most will be decided and a lot discovered than we will move on to the surprise that Angel promised.

EDIT: Oh and guys, while I don't mind even encourage collab posts but a mass collab post which can impact the plot line, I would appreciate it we do not start that without my knowledge.