As long as a Character on the field has had its cost jacked up to 8, the decks Leader card effectively has a Power of 6000, allowing heavier damage to be dealt while also making it easier to counter out of opposing attacks
Youd expect an effect like this to work only with cheap spells, but the three or greater clause here allows you to copy big, impactful instants and sorceries, ensuring that any 20s you roll will be well worth the wait
Some more evidence of this can be found by comparing the progression of the classic Haymaker duo: Hitmonchan and Electabuzz
Most drastically, it dictates what colour cards you'll play: you can only use colours that are in your commander's casting cost, or the cost of its abilities
When she is on the field, whenever her controller taps a land for mana, they add one mana of any type that land produced
Absolutely amazing deck