If the Aura can't legally be attached to anything, you can't choose to put it onto the battlefield at all
Once he hits, every player will feel it, and the game gets a very definite timeline to the end of the game
If you do have Cloud attack, you can benefit from his card draw ability
Activate any abilities that immediately activate once their requirements are met (e.g.: When you evolve into this Digimon, send the opponent's 'Dark Tower' card to the Dark Area.) After both players have carried out their evolutions, any cards left in the Evolution Box and Evolution Requirements Box that were not used will be sent to each player's Dark Area respectively
I'm also not mad Omnath isn't one of the top 10 most played landfall cards, despite being by far the most popular commander in a Landfall theme deck and one of the most popular Lands-Matter deck headliners
Mega Gardevoir-EX became famous for its Brilliant Arrow attack