Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)
Double strike
Other tapped creatures you control have hexproof.
Flood the board with creatures, then flash in The Wandering Rescuer via Convoke to ambush blockers or push damage with double strike. Her hexproof clause protects your tapped attackers, enabling aggressive go-wide swings and combat that's hard to interact with. You win by overwhelming the table with a wide, evasive, well-buffed army.
Convoke lets you cast a 5-mana threat for almost nothing in a token-heavy board
Flash enables surprise blocks, instant-speed alpha strikes, and ambushing attackers
Double strike makes her a strong anthem/equipment target
Hexproof on tapped creatures blanks targeted removal during attacks and after convoking
Mono-white means limited card draw and ramp compared to other colors
Board wipes reset your token engine and leave you exposed
Hexproof only protects tapped creatures, not untapped blockers or the Rescuer herself reliably
Relies on having a developed board to convoke and to matter—weak in the early game
Legendary Creature — Human Samurai Noble
or one mana of that creature's color.)