Siegfried, Famed Swordsman Menace and a touch of self mill arent enough to help Siegfried escape the mediocrity that similar cards generally end up in, but do make it better than many of your other get big based on the size of your graveyard cards
If your creature has an activated ability to requires it to tap like Llanowar Elves you cannot tap it the turn it comes into play unless it has haste
Orzhov (black/white) has plenty of effects that can make cards create more tokens to accomplish the goal of having a battlefield of Mites easier
For example, trade a card for 1 thats slightly better, then trade that card with someone else for another thats slightly better, and so on
Yes, it can counter things for two mana, but outside of Geist of Saint Traft or Geralfs Messenger when youre on the draw, thats not something you really need to do