In depth breakdown:
Cards remaining from Round 9:
1 Lycan
5 Nova
1 Arsenic
1 Momentum
4 Graboid
1 Forest Spirit
20 Burning Pillars
5 Deflag
3 RoF
7 Lava Golem
4 Rage Potion
19 Fire Pends
1 Fog
1 Lightning
1 Reflective Shield
6 Sanctuary
2 EQ
2 Miracle
2 Fahrenheit
1 Fire Shield
6 Fire Bolt
3 Crimson Dragon
Cards used during Round 10:
1 Lycan
5 Nova
1 Arsenic
1 Momentum
4 Graboid
1 Forest Spirit
30 Burning Pillars
5 Deflags
3 RoF
7 Lava Golem
4 Rage Potion
30 Fire Pends
1 Fog
1 Lightning
1 Reflective Shield
6 Sanctuary
2 EQ
2 Miracle
2 Fahrenheit
1 Fire Shield
6 Fire Bolt
5 Crimson Dragon
5 Dim Shield
2 Fractal
Difference between the two rounds:
10 Burning Pillar
11 Fire Pends
5 Dim Shield
2 Fractal
2 Crimson Dragon
Okay now things get a bit more complicated.
Salvageable cards (of the difference): 4 Dim Shield, 2 Fractal
Unknown cards revealed: 6 (minimum), 12 (maximum)
-1 Dim Shield, 2 Crimson Dragon + 3 Pends/Pillars OR 5 Dim Shield, 2 Fractal, 2 Crimson Dragon + 3 Pends/Pillars (we'll probably assume 6 to be safe)
However because the difference between revealed cards for each round is a total of 30 and we knew that they salvaged 18 new cards during Round 9, this means the total for Unknown cards revealed during Round 10 must be 12. Therefore, we must add 6 Pends/Pillars to the minimum listed above to balance this.
Removing these 12 cards gives us 25 unknown cards remaining from Round 9 - the exact same unknown cards remaining during Round 10. A number of these could have been converted between Rounds 9 and 10.
There are also 5 PUs which have not been seen since Round 8.
The number of salvages Fire has been given makes this much more difficult to break down, however, and there is a large amount of uncertainty stemming from them.