Most played cards in Burn:

5 Decks
Flames of the Blood Hand
20 copies - 4 average
Volcanic Hammer
19 copies - 3.8 average
Char
19 copies - 3.8 average
Shock
16 copies - 3.2 average
Lava Spike
16 copies - 3.2 average
Lightning Helix
16 copies - 3.2 average
Sacred Foundry
15 copies - 3 average
Battlefield Forge
12 copies - 2.4 average
Glacial Ray
12 copies - 2.4 average
Giant Solifuge
11 copies - 2.2 average
Pyroclasm
10 copies - 2 average
Faith's Fetters
10 copies - 2 average
Wrath of God
8 copies - 1.6 average
8 copies - 1.6 average
Scorched Rusalka
8 copies - 1.6 average
Mikokoro, Center of the Sea
8 copies - 1.6 average
Pithing Needle
7 copies - 1.4 average
Threaten
6 copies - 1.2 average
Parallectric Feedback
5 copies - 1 average
Seal of Fire
5 copies - 1 average