(Note that early on, An made use of an errata on Judgebau that allows his skill to activate when the attack he boosts hits a rearguard. A misprint in the English run of BT15: Infinite Rebirth led many fighters to believe that the skill would only activate on a vanguard hit.)
Wong negated the -1 of “Abyss'” legion skill on the next turn by superior calling with Wily Revenger Mana on the next turn and retiring her call target for “Abyss,” but did not check any triggers on either of his twin drive checks. With An having started Wong's turn at 2 damage, this severely curtailed the impact of “Abyss'” second attack, and left An able to make a decisive next turn by break riding “Abyss” over Mordred, creating both a 21000 power Macart line whose on-legion skill negated “Abyss'” -1 in a more efficient manner than Mana, and a restanding 32000 power Phantom Blaster “Abyss.” This left An with a seven card advantage over Wong at the end of that turn, so that the remaining game played out defined by this gap until Wong was eventually pushed to six damage. An won the round 2-0 due to gaining a severe advantage from Wong being gradelocked at 0 for two turns, which left An with more time to set up his strategy and get in early damage.
Nam Vo's turnaround came in game 2 and 3; in game 2 An redrew five cards and still ended up gradelocked as Dark Shield Mac Lir, causing Vo to win the game before he could ever reach grade 3. In the third game an early critical trigger from Vo on turn 1 set him ahead significantly. An would have been better off to guard all of Vo's attacks while he was on grade 2, but choosing not to left him at 3 damage before Vo had hit grade 3. Going second allowed Vo to be the first to legion, using two Freyjas and Pray Angel to soulcharge 9, setting up his soulblast 6 legion skill. With CEO Yggdrasil's final power at 33000 power 2 critical and blocking all grade 1 and higher cards from being guarded with, there was no feasible way for Matthew An to guard the attack, and a critical trigger put him from 3 to 6 damage, making Nam Vo the ARG Circuit champion.