Ragnar, Slayer of Goblins

Haste
Ragnar enters the battlefield with {x} +1/+1 counters
{x}{t} remove {x} +1/+1 counters from Ragnar, pervent {x} damage from any source, {t} put {x} +1/+1 counter on Ragnar where {x} is the number of dragons you control, {b/r}{b/r}{t} untap all creatures you control