A Feast in Time of Plague

A Feast in Time of Plague (黒死病の時代の饗宴,) is the ability of Alexander Pushkin.

Description
A Feast in Time of Plague allows Pushkin to give someone a special type of virus normally with the help of another person like Nathaniel Hawthorne and Ivan Goncharov.

No further details are said about the ability's virus. However, it is said that, when inserted into two people, it can cause the two people to fight each other to death. The virus inserted in the survivor will be gone and the other one dies fighting.

Derivation
The ability is based on A Feast in Time of Plague (Пир во время чумы, Pir vo vremya chumy), an 1830 play by the real-life Alexander Pushkin about a banquet.