Darkmoon Card of Destruction

So far there seems to be four different cards:

Hurricane Deck:
Darkmoon Card: Hurricane
Binds when equipped
Unique-Equipped
Trinket
+321 Agility / +321 Strength (Two different versions: Agility version, or strength version.)
Requires level 85
Item level 359
Equip: Chance to strike your enemies for 5250 to 8750 Nature damage when dealing damage with melee or ranged attacks.

Tsunami Deck:
Darkmoon Card: Tsunami
Binds when equipped
Unique-Equipped
Trinket
+321 Intellect
Requires level 85
Item level 359
Equip: Your healing spells have a chance to increase your Spirit by 80 for 20 sec. This effect can stack up to 5 times.

Earthquake Deck:
Darkmoon Card: Earthquake
Binds when equipped
Unique-Equipped
Trinket
Requires level 85
Item level 359
Equip: Increases your dodge rating by 321
Use: Increases maximum health by 11500 for 15 sec. Shares cooldown with other Battlemaster's trinkets. (3 Min Cooldown)

Volcanic Deck:
Darkmoon Card: Volcano
Binds when equipped
Unique-Equipped
Trinket
Requires level 85
Item level 359
Equip: Improves Mastery rating by 321.
Equip: When dealing damage with spells, you have a chance to deal 900 to 1500 additional Fire damage to the target and gain 1600 Intellect for 12 sec.

Edit - Updated yet again

Here are some of mine data gathered over the time period of two months concerning gain in inferno ink per different herbs milled, and droop rate of cards per decks and every card in deck. All average calculations are based on mine data ant they can vary in some extent, mostly in parts where I didn't have enough data to make statistically valid calculations, like cards distribution trough each card in deck.

Hope it helps you

Cinderbloom
Milled: 16370 (3274 mils)
Ashen Pigment: 8086
Ashen Pigment on average per stack: 9.87904703726329
Burning Embers: 887
Burning Embers on average per stack: 1.08368967623702
Inferno Ink on average per stack: 1.03579718998167*
Stacks need for 1 card: 9.65439962255249

Azshara's Veil
Milled: 1765 (353 mills)
Ashen Pigment: 886
Ashen Pigment on average per stack: 10.0396600566572
Burning Embers: 102
Burning Embers on average per stack: 1.15580736543909
Inferno Ink on average per stack: 1.07988668555241*
Stacks need for 1 card on average: 9.26023084994754

Stormine
Milled: 2315 (463 mills)
Ashen Pigment: 1152
Ashen Pigment on average per stack: 9.9524838012959
Burning Embers: 126
Burning Embers on average per stack: 1.08855291576674
Inferno Ink on average per stack: 1.04190064794816*
Stacks need for 1 card on average: 9.59784411276949

Twilight Jasmine
Milled: 4660 (932 mills)
Ashen Pigment: 2805
Ashen Pigment on average per stack: 12.0386266094421
Burning Embers: 474
Burning Embers on average per stack: 2.0343347639485
Inferno Ink on average per stack: 1.61909871244635*
Stacks need for 1 card on average: 6.17627567925779

Whiptail
Milled: 15690 (3138 mills)
Ashen Pigment: 9471
Ashen Pigment on average per stack: 12.0726577437858
Burning Embers: 1643
Burning Embers on average per stack: 2.09432759719567
Inferno Ink on average per stack: 1.65079668578713*
Stacks need for 1 card on average: 6.05768117061117

*considering trading all Blackfallow ink to Inferno ink

In total have made 305 cards

Cards distribution per each deck/card

Hurricane Deck:95 (31.15%)
1: 4 (1.31%)
2: 14 (4.59%)
3: 12 (3.93%)
4: 15 (4.92%)
5: 10 (3.28%)
6: 18 (5.90%)
7: 6 (1.97%)
8: 16 (5.25%)

Tsunami Deck: 44 (14.43%)
1: 4 (1.31%)
2: 6 (1.97%)
3: 7 (2.30%)
4: 5 (1.64%)
5: 4 (1.31%)
6: 5 (1.64%)
7: 9 (2.95%)
8: 4 (1.31%)

Earthquake Deck: 67 (21.97%)
1: 11 (3.61%)
2: 5 (1.64%)
3: 10 (3.28%)
4: 7 (2.30%)
5: 5 (1.64%)
6: 8 (2.62%)
7: 10 (3.28%)
8: 11 (3.61%)

Volcanic Deck: 99 (32.46%)
1: 18 (5.90%)
2: 9 (2.95%)
3: 11 (3.61%)
4: 17 (5.57%)
5: 10 (3.28%)
6: 12 (3.93%)
7: 15 (4.92%)
8: 7 (2.30%)

What cards do you need for each trinket?

Hurricane = Winds

Tsunami = Waves

Earthquake = Stones

Volcano = Embers