mtg apex cards Snapdax, of the Hunt Mint / near mint condition trading card Brokkos, Apex of Forever [Ikoria:

The same is true for opus (Prismari) and increment (Quandrix), which don't require a lot of effort to work, while infusion and the Lorehold card need some more dedication (but the latter triggers over flashback cards, which are usually good by themselves)

But giving the Chimera away doesnt end the subgame

Liesa, Forgotten Archangel Next is the newer (albeit weaker) version of Liesa, Liesa, Forgotten Archangel

So, even if you draw a card to answer the big threat that came out of your deck, you'll likely have to discard it before you can use it

Additionally, theres the issue that there simply may not be someone within your area that wants a card

Experimental Augury I love that proliferate is attached to so many cards as extra flavor