Astegon – Aegis Wyvern of Death

OnDeploy@ Choose up to 1 Pal, and it gets Power@ -1000 until end of turn (It is not put into the graveyard even if Power@ becomes 0 or less).

OnAttack@ Choose all Pals with Power@ 300 or less, and put them into the graveyard (Choose your Pals too).