Theyre perfectly fine and probably very fun to play out of the box against one another, but they dont stand out amongst the best precons of all time
You can choose not to have Omni-Changeling enter as a copy of another creature
It also buffs any of the tokens it makes, as well as fun food creatures like Gingerbrute
Fetchlands and fetchable duals, particularly Triomes, enable players to play three or more colors, whereas shocklands, fastlands, painlands, and any land that enters the battlefield tapped while only tapping for two different colors will push players to draft more two- to three-color decks
If you generate lots of mana but are never able to find your big spells
The activated ability requires more creatures for a higher chance of hitting a creature