{2}{G}, {T}, Put a verse counter on Yisan: Search your library for a creature card with mana value equal to the number of verse counters on Yisan, put it onto the battlefield, then shuffle.
If Yisan isn't on the battlefield when its ability resolves, use the number of verse counters on it when it left the battlefield to determine which creature cards may be put onto the battlefield. This number will include the counter you put on Yisan to activate the ability.