Slickshot Show-Off is a multi-format staple
W for a 1/1 (So far, so good.) 2W for a 2/2 (Pearled Unicorn, but not horrible.) 10W for a 5/5 first strike creature (Wait, what?) 1U for a 0/3 (Eh, but bearable.) 3U for a 0/6 (Getting pretty bad here.) 11U for a 6/6 islandwalk creature (Wait, what?) B for a 1/1 (Muck Rats, but okay.) 4B for a 3/3 (Looking a little worse here.) 12B for a 5/5 creature with pseudo-fear (Wait, what?) Those ultimate mana costs were paid out over multiple turns, but if your creature died before hitting their highest level game over, tons of wasted mana, yikes
For better or worse, however, not every Commander deck is Esper or more
If they deal damage through an attack, and even if they knock out Iron Boulder ex, you get to put eight damage counters on the Pokemon that damages it
Honorable Mention | Radiant Lotus Radiant Lotus is a very difficult card to assess
For example, an aura-based EDH deck would run Winds of Rath to destroy everything but their creatures, allowing them to leverage the board wipes as a catch-up mechanism and finisher