Copying artifacts and enchantments can get out of hand, though this is all fiddly enough that I wouldnt expect it to be too problematic
Less exciting but still solid is Impossible Inferno
The most obviously powerful one of these is Syvelun of Sea and Sky, which is basically an indestructible merfolk that draws cards and helps protect your other creatures
Then the recently printed Offering costs two too, also sacrifices both, and this time leaves you a Map token to either draw the top land of your library for a three for one, or give a dork a +1/+1 counter
Recommended Commanders: Zada, Hedron Grinder, Krark, the Thumbless, Okaun, Eye of Chaos // Zndrsplt, Eye of Wisdom The Deck of Many Things If Fiery Gambit is too risky for you, try The Deck of Many Things