C19 Virus

C19 Virus enters the battlefield tapped.
When C19 Virus enters the battlefield sacrifice it unless you pay {3}{b/r}{b/r}
Whenever a creature enters the battlefield or dies,
put a virus counter on C19 virus.
{t}Remove x virus counters from C19 Virus :
add x mana of any one color to your mana pool.
{4}{t}: C19 Virus deals x damage to each creature
and player, where x is the number of
virus counters on C19 Virus. Then sacrifice C19
Virus.