I have been active on eBay for years. It has been my preferred site for buying and selling my commander foils. They do sell gift cards for eBay. I use them constantly. You do need an eBay account and a PayPal account to use them.
Personally, I would cut the bigger creatures and anthem effects for more 2-power creatures and run four Dusk // Dawn. Dusk spares all of your creatures, leaving your opponent with just their little guys against your flanking knights, and Dawn is a great late game card advantage engine.
Strategy:
This is a straight combo deck. The objective is to have a Seedborn Muse and either Eternal Witness or Greenwarden of Murasa in play and either Ghostway or Eerie Interlude in hand. This combination of cards allows you to blink out your team during each player's turn, which triggers a host of ETB and LTB effects, as well as making your team immune to almost all sorcery-speed removal.
Death's Shadow
Street Wraith
Thoughtseize
Dismember
-4 Winter's Grasp
-4 Call of the Herd
-4 Rampant Growth
-2 Yavimaya Elder
+4 Molten Rain
+4 Pillage
+4 Fulminator Mage (if it's in your budget)
+1 Strip Mine
+1 Dust Bowl
Noose Constrictor is a great add. Honored Hydra is an upgrade over Roar, as the token has trample.
If you are trying to avoid BB, I would switch Sign in Blood for Night's Whisper.
I don't know if your play group will appreciate it, but Desolation Angel is a pretty brutal win condition in these colors.
Arcane Sanctum is a perfect addition to your manabase.
Hymn to Tourach
This is a straight combo deck. The objective is to have a Seedborn Muse and either Eternal Witness or Greenwarden of Murasa in play and either Ghostway or Eerie Interlude in hand. This combination of cards allows you to blink out your team during each player's turn, which triggers a host of ETB and LTB effects, as well as making your team immune to almost all sorcery-speed removal.
The Deck:
1 Roon of the Hidden Realm [C13]
Creature Spells:
1 Angel of Finality [C13]
1 Angel of Serenity [RTR]Foil
1 Armada Wurm [RTR]Foil
1 Brago, King Eternal [CNS]Foil
1 Coiling Oracle [DIS]Foil
1 Consecrated Sphinx [MBS]Foil
1 Deadeye Navigator [AVR]Foil
1 Draining Whelk [TSP]Foil
1 Duplicant [MRD]Foil
1 Ephara, God of the Polis [BNG]Foil
1 Eternal Witness [5DN]Foil
1 Farhaven Elf [SHM]Foil
1 Fierce Empath [SCG]Foil
1 Gilded Drake [USG]
1 Greenwarden of Murasa [BFZ]Foil
1 Harmonic Sliver [TSP]Foil
1 Karmic Guide [ULG]Foil
1 Luminate Primordial [GTC]Foil
1 Mulldrifter [LRW]Foil
1 Mystic Snake [APC]Foil
1 Nevermaker [MOR]Foil
1 Perplexing Chimera [BNG]Foil
1 Phyrexian Ingester [NPH]Foil
1 Prime Speaker Zegana [GTC]Foil
1 Progenitor Mimic [DGM]Foil
1 Reclamation Sage [M15]Foil
1 Recruiter of the Guard [CN2]Foil
1 Reveillark [MOR]Foil
1 Sea Gate Oracle [ROE]Foil
1 Seedborn Muse [LGN]Foil
1 Solemn Simulacrum [MRD]Foil
1 Sower of Temptation [LRW]Foil
1 Sphinx of Uthuun [M12]Foil
1 Stonecloaker [PLC]Foil
1 Sunblast Angel [SOM]Foil
1 Thragtusk [M13]Foil
1 Venser, Shaper Savant [FUT]Foil
1 Wood Elves [7ED]Foil
1 Yavimaya Dryad [TSP]Foil
1 Aura Shards [INV]Foil
1 Birthing Pod [NPH]Foil
1 Bring to Light [BFZ]Foil
1 Chord of Calling [RAV]Foil
1 Conjurer's Closet [AVR]Foil
1 Cyclonic Rift [RTR]Foil
1 Day of Judgment [ZEN]Foil
1 Eerie Interlude [SOI]Foil
1 Eladamri's Call [PLS]Foil
1 Eldritch Evolution [EMN]Foil
1 Ghostway [GPT]Foil
1 Green Sun's Zenith [MBS]Foil
1 Mana Crypt [Judge]Foil
1 Momentary Blink [TSP]Foil
1 Rite of Replication [ZEN]Foil
1 Sol Ring [Judge]Foil
1 Supreme Verdict [RTR]Foil
1 Venser, the Sojourner [SOM]Foil
1 Wargate [ARB]Foil
1 Wrath of God [7ED]Foil
Lands:
1 Adarkar Wastes [7ED]Foil
1 Alchemist's Refuge [AVR]Foil
1 Bant Panorama [ALA]Foil
1 Breeding Pool [DIS]Foil
1 Brushland [7ED]Foil
1 Canopy Vista [BFZ]Foil
1 Command Tower [Judge]Foil
1 Flooded Grove [EVE]Foil
1 Flooded Strand [ONS]Foil
1 Forest [UNH]Foil
1 Forest [UNH]Foil
1 Forest [UNH]Foil
1 Glacial Fortress [M10]Foil
1 Hallowed Fountain [DIS]Foil
1 Hinterland Harbor [ISD]Foil
1 Island [UNH]Foil
1 Island [UNH]Foil
1 Island [UNH]Foil
1 Island [UNH]Foil
1 Krosan Verge [JUD]Foil
1 Minamo, School at Water's Edge [CHK]Foil
1 Misty Rainforest [ZEN]Foil
1 Myriad Landscape [C14]
1 Mystic Gate [SHM]Foil
1 Plains [UNH]Foil
1 Plains [UNH]Foil
1 Plains [UNH]Foil
1 Prairie Stream [BFZ]Foil
1 Savannah [REV]
1 Seaside Citadel [ALA]Foil
1 Sunpetal Grove [M10]Foil
1 Temple Garden [RAV]Foil
1 Temple of Enlightenment [BNG]Foil
1 Temple of Mystery [THS]Foil
1 Temple of Plenty [BNG]Foil
1 Tropical Island [REV]
1 Tundra [REV]
1 Windswept Heath [ONS]Foil
1 Wooded Bastion [SHM]Foil
1 Yavimaya Coast [APC]Foil