Can You Counter a Copy of a Spell
When your Commander already has evasion and hexproof, and Wizards keeps printing more cards that do more than one thing, you naturally find that your initial extra deck space feels even wider
These include Glacial Dragonhunt (loot, removal), Rally the Monastery (Monk tokens, removal, pump), Channeled Dragonfire (removal), Broadside Barrage (loot, removal), Chart a Course (draw), and the massively powerful Jeskai Revelation (bounce, direct damage, creature tokens, card draw, life gain)
It also gives me a draw / discard trigger whenever one or more Zombies I control deal combat damage to my opponents
Then if this creature has five or more filibuster counters on it, you win the game