You need a small board first, which is why the early game is entirely about cheap characters
(To collect evidence 3, exile cards with total mana value 3 or greater from your graveyard.) , , Collect evidence 3: Each opponent loses 3 life unless they discard a card or sacrifice a creature
Pure Reflection, unlike Spirit Mirror, creates tokens of various sizes based upon a criterion (the mana value of the spell cast)
When you have the safety of the Orb in play you will only ever be sacing off lands at the last minute which is hopefully at a point where it does not overly damage you
Seshiro boosts Snakes with a hefty +2/+2 and every Snake becomes a Stealer of Secrets
Its also certainly a good card in its own right, since you end up spending only three mana for a 3/2 and a 4/3, while an opponent also loses 4 life