4c Legends goes wide with a huge density of small legendary creatures, most 2/2 or 3/2 bodies, so a mana-sink sweeper is much stronger than one-for-one removal. Day of Black Sun for X=2 or 3 wipes the vast majority of their board — Zack Fair, Spectacular Spider-Man, The Wondrous Wasp, and similar small legends lose all abilities and die upon resolution, though opponents can still respond with activated abilities while it is on the stack. Nowhere to Run's -3/-3 cleanly kills most of their creatures outright as a cheap answer to whatever resolves first. An additional Maelstrom Pulse handles a problematic legendary creature or nonland permanent; Flashfreeze stays in the board since this opponent casts almost nothing red or green.