That may sound slow, but assuming youve also got a few one mana creatures like Ruin Crab, which mills whenever you play a land, and maybe a couple of copies of Tashas Hideous Laughter, then you can easily take someone out by turn six or so with this strategy
Examples of such dual sets include Blue Shock [XY8] / Red Flash [XY8], To Have Seen the Battle Rainbow [SM3H] / Darkness that Consumes Light [SM3N], and Snow Hazard [SV2P] / Clay Burst [SV2D]
Genesis Chamber is another great Myr token generator
This card checks the right boxes: exclusive distribution, limited time window, and a recognizable Pokemon that collectors actively chase
Finally, several of the cards that were mentioned on the Command Zone podcast as underrated in Commander spiked this week, lead by Seedtime and Holistic Wisdom which both nearly doubled in price
You have access to toxic right out of the command zone, its a 2-mana commander, and you can start infecting people early in the game