COVID-19

Infect target creature. During upkeep, the owner
of the infected creature infects another creature
he controls. Creatures with "mask" in the name
or enchantment name cannot be infected.
Infected creatures with "old" or "ancient" in the
name are destroyed. Creatures fighting infected
creatures become infected. If all creatures of a
player become infected, that player becomes
infected. Infected creatures or players receive
double damage whenever receiving damage.