Dinomorphia Sonic

When your opponent activates a Spell/Trap Card, while you control a "Dinomorphia" monster: Pay half your LP; negate the activation, and if you do, destroy that card, then, destroy 1 "Dinomorphia" monster you control. During damage calculation, while your LP are 2000 or less, if you would take battle damage: You can banish this card from your GY; you take no battle damage from that battle. You can only activate 1 "Dinomorphia Sonic" per turn.