The rules are same as daily and weekly challenges you don't need to duel some1 from RRA but to receive your rewards you must post a screenshot of your win(s) in reply to this topic and you can do it in single or match.
Mimicry's Monthly Challenge: Gain 400 rating on DN using a tier 3 or lower deck if you do not know what decks you can use ask another member and take a screenshot of your current rating and your rating once u finish. Reward: 500 RP
Vanishing's Monthly Challenge: Win 15 Arena Duels using Inzektors Reward: 400 RP
Impale's Monthly Challenge: Win a duel by attacking your opponent with Destiny Hero - Plasma 5 times Reward: 350 RP
Tribute's Monthly Challenge: Beat a tier 1 deck 10 times with Cloudians Reward: 600 RP
After you finish your challenge you can do this bonus on for 1000 RP Bonus Challenge: Win 3 duels but on you must have all 3 sacred beasts cards out when you win.
Mimicry's Monthly Challenge: Gain 400 rating on DN using a tier 3 or lower deck if you do not know what decks you can use ask another member and take a screenshot of your current rating and your rating once u finish. Reward: 500 RP
Vanishing's Monthly Challenge: Win 15 Arena Duels using Inzektors Reward: 400 RP
Impale's Monthly Challenge: Win a duel by attacking your opponent with Destiny Hero - Plasma 5 times Reward: 350 RP
Tribute's Monthly Challenge: Beat a tier 1 deck 10 times with Cloudians Reward: 600 RP
After you finish your challenge you can do this bonus on for 1000 RP Bonus Challenge: Win 3 duels but on you must have all 3 sacred beasts cards out when you win.