+ Shardually Inclined: For every duel you win, you may use 1 shard in your deck (refreshes upon a new opponent).
+ Comeback Kid: For every duel you lose, you may use 2 shards in your deck (refreshes upon a new opponent).
Not sure which interpretation is correct:
Does "duel" refer to individual games of a Bo5 match between players, or the entire match of Bo5 ?
So on the first game (duel) of the match, no extra shard for either of those options, then in subsequent games (2nd, 3rd, 4th, 5th) you may have gained the ability to use some, but once the match is over, you shard allowence is reset to 0.
OR
Duel refers to the entire match of Bo5 games, meaning in the first round you have no shards (against 1st opponent), but then in the second round you may have 1/2 -- fixed number throughout all the games of the Bo5, you allowence changes from round to round, i.e. when you are facing a new opponent.