Calculating this using the Spell Statistics tab in the CDF, we find that we should play at least fifteen one-drops (90.9%) to meet our requirements
Put a +1/+1 counter on that creature for each nonland card discarded this way.) You must already control a Swamp as Spymaster's Vault enters the battlefield for it to enter untapped
The card provides a powerful token doubling effect, so anything that makes strong tokens is a great inclusion
If you enter it without Supernovas in the correct positions, the reveals miss and you've wasted the tempo
Remember: you are essentially getting a pile of cards that (as of a couple of days ago) were worth $100 or more for only $35
Synergistic picks: Doubling Season : Double those lore counters and get to Mega Flare faster Jodah, the Unifier : Cast this cheaper, buff your team, and ride the dragon Null Elemental Blast : underplayed protection spell Omnath, Locus of Mana : Builds a high-MV battlefield for massive Mega Flare payoff Aettir and Priwen This is the most Timmy pick on this list