Sure, your opponents recur any artifacts from their graveyards, but you get to plan around this, and the result is normally disproportionately in your favor
Finally, if things start going really bad, just pull a Kefka and destroy the world using Ruinous Ultimatum. This card is incredibly high-cost but allows you to destroy all non-land permanents all your opponents control
Delve can help reduce what you actually pay, but the card still has a huge mana value, meaning Quandrix still gives you a massive Cascade trigger
Golden Ratio I know Golden Ratio is a sorcery, but its better than you think
A good card database will let you search for all the Krakens in MTG, then let you refine your search further if there are too many results to choose from
Manifest dread is very similar to the earlier 'manifest,' but instead of placing the top card of your library face down, you look at the top two cards, place one of them face down as a 2/2 creature, and place the other in your graveyard