The Monarchs are Level 5 and have 2000 ATK and 1000 DEF, while the Mega Monarchs are Level 8 and have 2400 ATK and 1000 DEF and share the effect that they can be Tribute Summoned with 1 Tribute by using a Level 5 or higher monster with 1000 DEF
But I can see this actually being a great mid-game creature in a kraken deck that runs some powerful enchantments as a subtheme
(Fusion/Ritual Monsters) Fusion monsters can only be played by fusing 2 or more monsters together with a Magic card that has the effect to do so (like polymerization)
These boosters are optimized for drafting, so they don't include those eighteen Commander cards found in Set Boosters, but they do contain golden age, skyscraper, art deco, and Phyrexian Booster Fun versions of cards you can open in Set Boosters, including foil versions
It is simply oozing convenience, value, efficiency and tempo
For example, the Obuun deck needs the most ramp, since its both built around landfall and includes a lot of expensive creatures
