To explain this to the uninitiated: (First follow another explanation of the original combo)
In Magic spells are not in effect immediately, instead they go on the stack, before they are resolved. Spells from a stack are resolved in LiFo order, so last in, first out. Instants, like Gut Shot, can be put on the stack at any time by any player (simplified).
So Enemy gets his 21 mana with channel, you let that resolve, he has 1 life. He pumps it all into the fireball, now you act. While fireball is on the stack you cast Gut Shot, paying with 2 life of your 20. It goes on the stack. Your enemy hopefully has no response, without any mana left in his pool, and he looses his last life and the game.
When a player looses the game all his spells are removed from the stack, so you really win and there is no draw.
You stopped his combo with 4 cards worth unreal amounts of money with a single card worth about 50ct.
We do have many of them. We just have chosen not to mine them because that creates environmental and health issues and we can obtain them from elsewhere. When we mine them here, then mostly in remote places.
Cobalt: Top producer is DRC, Europe has a minor local production, mostly in Finnland Lithium: Abundant everywhere but difficult to extract, the EU doesn’t produce any significant quantities right now Nickel: Only 1.5% produced in EU, again mostly in Finnland Maganese: This is the only metal relevant for current batteries where there are no (known) significant deposits in central EU, some are around the black sea, industrial production is nonexistent.
Where the EU is already more present is in the refining of the raw ores. I think the current situation is, while not great, acceptable. As long as many different producers of the rare metals are available and the EU creates reserves of them (it does), it is fine to be dependent on imports for the moment.