mtg cards like moonmist TR&CI 180: Using To Skip Transform Requirements On Final Fantasy Humans (And As Removal) Can moonmist transform the magic
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So our 1/1 zombies dying can help add those counters up fast
Once your leaders set, focus on the tribal essentials, and dont forget that a solid mana base featuring effective Dual Lands is the backbone of any top-tier multicolored tribal list, if thats what you want to go for

When Contagion Clasp enters the battlefield, put a -1/-1 counter on target creature

Spread out counters, slip through in combat, and reanimate creatures/vehicles from opponents yards
Cards like Doubling Cube also demonstrate how this deviation from usual Magic arithmetic allows for unique and interesting build-arounds its not all just brute force and big numbers getting bigger
Sword of Hearth and Home provides blink and ramp all at once, making it perhaps the most value-oriented sword