You can support Aventurine, a new Imaginary Preservation unit in Honkai: Star Rail 2.1, after Acheron's banner expires. He is among the greatest sustain units available. So if you don't have any good sustain units or you want to play follow-up assault teams with players like Topaz and Dr. Ratio, we highly suggest you select him.

Here's a short glance at all of Aventurine's XP, Ascension, and Trace ingredients if you intend to pre-farm for him. The following materials are based on the assumption that you will level up every single trace and bring Aventurine all the way to level 80. The number of resources will decrease dramatically if you are not a high enough Trailblazer to max out characters or if you just don't want to level up his tracks all the way.

Honkai: Star Rail 2.1: Materials for Adventure XP

To advance and level up Aventurine, you will require the following quantity of credits and XP materials: 

290 Guide for Travelers OR 1160 Journal of Adventure

Credits: 887,800

Honkai: Star Rail 2.1: Materials for Aventurine Ascension

The following supplies will enable you to reach the highest ascension level in Aventurine: 

• Bits of Thought - fifteen
• Pieces of an Image - x15 
• Pieces of Desires - fifteen 
• X65: Suppressing Edict

Honkai: Star Rail 2.1: Materials for the Adventure Trace

Here are the overall resource expenditures, assuming you wish to max out every trace in Aventurine's kit: 

Three Million Credits (3,000,000)

×8 - Tracks of Destiny 

Historical Harms of the Borehole Planet Catastrophe - ×12 

Pieces of Stardust - ×18 

Random Thoughts - ×41 

Scattered Impressions - ×56 

Broken Dreams - ×58 

×69 Crystal Meteorites 

×139, Divine Amber

If you decide not to level all of Aventurine's traces to the maximum level, the cost of leveling him down decreases dramatically, so make sure to modify your pre-farming preparations appropriately.