(Equipment, Auras you control, and counters are modifications.) If the creature you control is an illegal target as Signature Slam tries to resolve but the creature you don't control is still a legal target, each modified creature you control (which may include the target creature you control if it's still on the battlefield) will still deal damage equal to its power to the creature you don't control
So knowing we wont get another set quite like Rise, The Brothers War seems like a good way to capture that feel
Using the seven Dwarves to create a wide board of Characters that synergize with one another, players can then use that board state to interact with the two top-end cards in the Tactical Teamwork deck, The Queen, Commanding Presence, and Christopher Robin, Adventurer
Luckily, Gilgamesh himself is a Samurai Creature, meaning he can the battlefield and automatically get an Equipment