krokorok pokemon card SV11B] 061/086〈C〉Monster Ball Reverse Holo [darkness] Krokorok Battle Carnival 2011 Holo

Hiker is a game-changer often a match-winning card

This thing stops you losing to practically everything, except for mill, win the game effects from opponents, and the very rare instance of someone stopping damage prevention and hitting you for 21 Commander damage (your life total wont change, but youll still take the 21 marked damage from a Commander)

Mount Doom, a red-black land that hurts you when it makes mana, can also hurt your opponents and act as a board wipe if you sacrifice it and a legendary artifact (like The Ring)

Dimir Informant, Dream Eater, Watcher in the Mist, and Whisper Agent all have enter-the-battlefield Surveil triggers