I had piloted Monsters before during the Theros days in Magic: the Gathering Standard with Polukranus and Stormbreath Dragon as the deck’s main superstars. It is a good thing that they are still using the term again, this time with the recent addition of Amonkhet in Standard.
Here is the deck feature of the day and probably the latest version of RG Monsters, featuring Bristling Hydra and Glorybringer.
Maindeck
22 LANDS
4 Aether Hub
6 Forest
4 Game Trail
4 Mountain
4 Sheltered Thicket
24 CREATURES
3 Bristling Hydra
4 Glorybringer
4 Greenbelt Rampager
4 Lambholt Pacifist
3 Prowling Serpopard
3 Rhonas the Indomitable
3 Voltaic Brawler
10 INSTANTS and SORC.
4 Attune with Aether
2 Blossoming Defense
4 Harnessed Lightning
5 OTHER SPELLS
2 Chandra, Torch of Defiance
3 Heart of Kiran
SIDEBOARD
1 Arlinn Kord
1 Bristling Hydra
1 Chandra, Torch of Defiance
1 Lathnu Hellion
3 Magma Spray
1 Manglehorn
2 Nissa, Vital Force
1 Release the Gremlins
1 Rhonas the Indomitable
2 Sweltering Suns
1 Voltaic Brawler