Quote from cfusionpm » Focusing specifically on Delver flipping, Serum "digs" a hypothetical 4 cards deep (1 draw, 2 possible bottom scrys 1 unknown random card), where Preordain can only "dig" 3 (2 known scrys, 1 unknown draw). While both give 3 possible opportunities to flip (2 known 1 unknown), the card in-hand can give a small (but measurable) addition in information about the unknown card (which could influence fetching/shuffling). So with that in mind, Serum is better at specifically making Delver flip.
Quote from SyloRiyami »Wouldn't we be able to check which cycle is getting reprinted, if any, by trying to fit the lands in each cycle in the given free spots? I'm leaning towards these being either the other tango pairs or a new cycle.