If you go Green you have access to ramp and fixing to keep up with the rest of the table, if you dont go Green youre going to be slow and need to focus the bulk of your deck on slowing down your opponents
While the politics of stealing creatures from your opponents can be engaging and exciting, you need to devote significant resources to bouncing Elrond in and out of the battlefield
Firstly, if youre desperate to get hold of them in order to use them in your deck, just know that you dont have to
At five mana to cast and three to equip, its on the upper end of what Id normally try to play, but this thing does a lot
If you can protect this, it shifts the game directly in your favor
Players that use the monarch mechanic in their decks know this and build around it