Fiora, Elite Duelist

When Fiora, Elite Duelist attacks, target creature
an opponent controls must block Fiora, Elite
Duelist this turn if able.
Whenever a creature dealt damage by Fiora, Elite Duelist this turn dies, put a Riposte counter on
Fiora, Elite Duelist.
At the beginning of your upkeep, if there are
exactly five Riposte counters on Fiona, Elite
Duelist, you win the game.