When a creature with squad enters, for each time you paid its squad cost, you create a token copy of the creature
5 Rare and/or Mythic Rare cards per pack
Halo Fountain Halo Fountain is a 3-mana artifact from Streets of New Capenna that creates tokens, draws cards, and even offers an alternative win condition
How many would be considered broken even as colorless cards
Meanwhile, Reckless Ringleader does work well with Krenko, Mob Boss, which really likes having haste, but considering that Goblins already have Goblin Chieftain and Goblin Warchief, which perform the same role but in a much more powerful way, it's hard for me to imagine the Goblin tribe finding room for a one-mana 1/1 with fringe upside