Surtr, the Brightsword

Cumulative upkeep - each player sacrifices a permanent
Indestructible, vigilance, haste.
If you control four or more permanents of the same type you can pay {r/w}{r/w}, if you do destroy all permanents of the type of your choice.
Surtr, the Brightsword can't attack or block unless you control no permanents other than it.