public void Fusion(int actionSlimeId, int targetSlimeId)
{
RawSlime actionSlime = FindSlimeById(actionSlimeId);
RawSlime fusionTargetSlime = FindSlimeById(targetSlimeId);
fusionTargetSlime.SetMass(actionSlime.GetMass() + fusionTargetSlime.GetMass());
fusionTargetSlime.GetPlayer().RemoveSlime(actionSlime);
SpendActions(1);
}