If Alisaie Leveilleur and Alphinaud Leveilleur are your commanders, your deck may contain cards with white and/or blue in their color identity, but not black, red, or green
The starting stats are bad, but this can quickly grow and it's attack trigger can help aggro decks get in for lots of damage early
Kros deals out shield counters (defense contractor), but there are other options
In that case, the ability will still resolve and you'll have the opportunity to collect evidence 9
This is such a fabulous synergistic fit, the card art and game design so carefully and wonderfully crafted, that fans cant resist
Basic cantrips like Consider and Thought Scour fill this role nicely, fueling your graveyard early in the game