The Skullspore Nexus 212/291 (The Lost Caverns of Ixalan)

This spell costs {X} less to cast, where X is the greatest power among creatures you control. Whenever one or more nontoken creatures you control die, create a green Fungus Dinosaur creature token with base power and toughness each equal to the total power of those creatures. {2}, {T}: Double target creature's power until end of turn.

NM - $14.00
LP - $11.30
MP - $8.40
HP - $5.60
DMG - $2.80