Tiamat's Treasure Trove

Draft five cards from the Draconomicon then you
may have each opponent Draft, if so you create five
5/5 Dragons with Indestructible, Flying & Melee.

You deal X damage divided evenly, rounded down,
among up to 5 target creatures & create X tapped Treasure tokens & lose X life & draw X cards then discard X cards. (X is the number of differently
named dungeons you've completed plus the number
of opponents that you currently have plus five)