Degrador, The Spellthief

Flash
Degrador, the Spellthief enters the battlefield
with {x} +1/+1 counters on it, and has the ability
'Ward {x}'. If {x} is 3 or greater as you cast
Degrador, the Spellthief, you may counter target Instant or Sorcery spell unless its controller pays {x}.
Channel --Pay 3 life, Discard Degrador, the Spellthief: You, and permanents you control,
have hexproof until end of turn.