User blog comment:KrystalLBX/20 damage challenge (OTK puzzle)/@comment-7097259-20170529155434/@comment-24612605-20170529160349

Impressive ^-^ you even decided to go the extra route of doing more then 20 damage.

Here is another solution

Hand:  Dancing Magician Tetsuya+ Roaring Thunder brave gao+ Aetherstorm + Reset+ full strush

call tetsuya to left or right then call gao to give tetsuya +1 crit. Equip aether storm (2 gauge remaining). Play reset (4 gauge remaining).

Link tetsuya and Gao, gao's skill (Gauge now at 3) and tetsuya gives gao double attack. (16 life remaining)  gao attacks again (14 life remaining) and restands with double attack. Gao attacks again (12)  Tetsuya attacks (10). Aetherstorm has double attack because you linked tetsuya and gao so it attacks once (8) and again (6). Full Strush formation for 6 damage and you have won.