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I recently came up with this tribal deck based on centaurs. This deck is made for the Modern Format. There is a list below but if you would like to see pictures of the cards you can view them on Archidekt.
Sorcery (8)
4 Call of the Conclave
4 Explore
Instant (12)
2 Fated Intervention
2 Fog
4 Pledge of Unity
4 Sundering Growth
Creatures (16)
2 Pheres-Band Warchief
2 Rosemane Centaur
2 Swordwise Centaur
2 Wildwood Patrol
4 Centaur Healer
4 Conclave Mentor
Lands (24)
2 Selesnya Guildgate
8 Forest
2 Graypelt Refuge
8 Plains
4 Blossoming Sands