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And then, as a Quick Effect, you can banish it to Synchro Summon an actual Red Dragon Archfiend from your Extra Deck, double its ATK, and make it immune to your opponents destruction effects

Then you draw X cards and lose X life, where X is the number of counters on Savanti Romero

If youre super confused at this point because you have no idea what proxies are, let me explain: proxy cards are essentially printed, homemade copies of MTG cards with different art or abilities (sometimes), or a completely custom card that doesnt exist in Magic like this or this

Their one shot burst nature really suits Tinker and Welder effects very well