The high MV is a problem, but with some support from cards like Repurposing Bay and Spire Golem this legendary artifact should be beefing up your creatures in no time
Criteria for Card Value Determining the value of your favourite cards is a simple process, but influenced by various factors
Players are most likely going to get common cards and a few of the rarer ones when purchasing packs
For instance: if you had three Clues, enough mana, and all the relevant cards exiled under Lazav, you could cast Cackling Counterpart targeting Lazav, hold priority before it resolves, sacrifice a Clue to trigger Lazav to transform him into Marionette Master, hold priority again, sacrifice another Clue to trigger Lazav to transform into Octavia, Living Thesis, hold priority once more, cast Armor of Shadows, let everything resolve, then sacrifice a final Clue
Just unbox and play