This skill is one of the best spells a Dainn would want for PvP, low cooldown, low cast time, and a super delicious way to knock up enemies from the ground to continue the combo!(Requires lv 4+ Pillar to do so).
Level 1 Pillar of Abyss from the ground chains directly into Cold Blue Dragon. Also, I believe it was Zet who has shown that Fire Bomb can be chained after Pillar of Abyss even if it's at level 1.
The final outlook looks like this:
Level 1 decay deletes into Cold Blue Dragon or Fire Bomb Dash AS
Level 4 decay deletes into Walk AA Dash AS
Level 7 decay deletes into Icicle Rain
And I do believe it allows a separate Meteor combo at max, but that definitely is way too advanced for this.
Putting a combo list for everything from easy to hard is... a bit too much for a "beginner" guide, especially when a guide already exists for the sole purpose of teaching combos. Just a few explanations of terms (Shift, autostep, etc.) should suffice.
Finally, you missed a [/