Do you like vehicles
Pokmon V-UNIONs have high HP and four powerful Moves, and when they get knocked out, the opponent gets three prize cards
One way I can think of would be pairing Slimefoot with Ashnod's Altar and Illusionist's Bracers: with the bracers equipped, use Slimefoot's ability to create two Saprolings, sacrifice them to the altar and ping opponents, then use that mana to repeat the process
If you attack with multiple creatures equipped with Hexplate Wallbreakers in one combat phase (or one creature equipped with multiple Hexplate Wallbreakers), you'll have that many additional combat phases, but your attacking creatures are untapped only during the current combat phase
502.15m A permanent that phases in can attack and tap to play abilities as though it had haste
Having a net profit of 2 red mana is already very good, but adding cost reducers like Goblin Electromancer just pushed the value beyond what is comfortable