Achilles Davenport (ACR 294)

Legendary Creature — Human Assassin • Mana cost: {2}{U}{B} • Assassin's Creed • Rare

Freerunning {U}{B} (You may cast this spell for its freerunning cost if you dealt combat damage to a player this turn with an Assassin or commander.)
Menace (This creature can't be blocked except by two or more creatures.)
Other Assassins you control get +1/+1.

Illustrated by Josu Solano.