Vittoria, Silver Sleuth

At the beginning of your upkeep, investigate.
(Create a colorless Clue artifact token with "{2},
Sacrifice this artifact: Draw a card.")
Vittoria, Silver Sleuth gets +1/+1 for each
Clue you control.
{w}, Sacrifice an artifact: Prevent the next 3
damage that would be dealt to any target
this turn.
No secret can hide from her piercing gaze.