Throne of Geth proliferates for the low, low price of tapping and sacrificing an artifact
For example, if you choose a card with flying and first strike, you may choose it as the card with flying and choose another card with first strike, or you may choose it as the card with first strike and choose another card with flying
That said, Mulcharmy cards should strictly be considered for "go-second" situations they are nearly useless if their owner has something on their board, plus they are absolutely terrible to see during the Draw Phase
The same is true for counters that change the creature's power or toughness
Criteria: Instants and sorceries within the Izzet color identity that can deal damage to an opponent without them specifically choosing for that to happen (get outta here, Wheel of MisfortuneWheel of Misfortune and BrowbeatBrowbeat!), and without having an additional cost of sacrificing a creature
If your opponent has any Pokemon with only ten HP remaining, use Gengar Pokemon Power: Curse and move a damage counter from one of the other Pokemon to that Pokemon