My Top 20 absolute favorite green cards are in order as follows:
1. Heroes' Bane
2. Scute Mob
3. Arlinn Kord (not completely green, but as a plainswalker she is awesome by defalt.)
4. Seasons Past (works just like a black card where you can bring things out of the graveyard, but without any consequences.)
5. Biorhythm (when combined w/ evacuation, it is a deadly combo.)
6. Soul of Zendikar (expensive, but really powerful)
7. Fleetfeather Cockatrice ( With flash deathtouch and monsterocity, it's a killer.)
8. Hooded Hydra
9. Sylvian Primordial
10. Nemesis of Mortals
11. Gyre Sage
12. Nessian Game Warden
13. Simic Charm (helps out in a pinch)
14. Arbor Colossus
15. Bassara Tower Archer ( not really strong, but it has hexproof and reach)
16. Ant Queen
17. Urban Evolution
18. Acidic Slime
19. Arbor Elf
20. Seek the Horizon
1. Heroes' Bane
2. Scute Mob
3. Arlinn Kord (not completely green, but as a plainswalker she is awesome by defalt.)
4. Seasons Past (works just like a black card where you can bring things out of the graveyard, but without any consequences.)
5. Biorhythm (when combined w/ evacuation, it is a deadly combo.)
6. Soul of Zendikar (expensive, but really powerful)
7. Fleetfeather Cockatrice ( With flash deathtouch and monsterocity, it's a killer.)
8. Hooded Hydra
9. Sylvian Primordial
10. Nemesis of Mortals
11. Gyre Sage
12. Nessian Game Warden
13. Simic Charm (helps out in a pinch)
14. Arbor Colossus
15. Bassara Tower Archer ( not really strong, but it has hexproof and reach)
16. Ant Queen
17. Urban Evolution
18. Acidic Slime
19. Arbor Elf
20. Seek the Horizon