In order to go long on green mana for Evolutionary Leap Ive moved away from double-black spells like Heros Downfall, but if I decide we need that effect we can always play more Utter Ends or whatever works best for the metagame at present
Satoru Umezawa makes it so that every creature card in your hand as ninjutsu for one black mana, one blue mana, and two generic mana
The former provides boosts to its controllers 2/2s, giving even weak vanilla and Disguised Creatures the ability to overpower opponents
And well, it turns out making two 4/4s is better than drawing three cards
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We know that the first LOTR run had about 3.3 million Collector Boosters, and given the odds, there were just under 900 Surge Foils of any given card