Buffalo, Phantom Terra Beast God (WXDi-P02-039) [Changing Diva]

[Auto]: Whenever another "Terra Beast" SIGNI enters your field, this SIGNI and the SIGNI that has just entered your field both get +4000 power until end of turn.
[Auto]: At the beginning of your attack phase, all SIGNI on your field with power 20000 or more gain "[Auto]: Whenever this SIGNI on your field with power 20000 or more gain "[Auto]: Whenever this SIGNI attacks, you may pay (R)(C). If you do, vanish target SIGNI in front of this SIGNI with power 12000 or less" until end of turn.