+0.5 points each
Unlockable once per player per season, in any scored game. No limit on how many you claim in one game. If several players would earn one at the same time, the active player (then turn order) gets it.
Kill someone with commander damage.
In a single turn, take a game action that results in an opponent killing another opponent where they otherwise wouldn't have been able to.
In a single turn, take a game action that results in an opponent being unable to kill another opponent where they otherwise would have been able to.
Eliminate 3 opponents in a single turn (effects that say "you win the game" don't count).
Have at least 1 card in hand, in graveyard, in the command zone, on the battlefield, and in exile at the same time.
Start your turn with 5+ creatures with power greater than their base power.
Cast 5+ spells with mana value 5+ in a single game.
In a single combat phase, trigger and/or activate 5+ abilities (mana abilities don't count).
Start your turn with 5+ differently named creature tokens.
Play 3+ cards and/or control 3+ permanents owned by your opponents in a single game.
Cast and/or copy 5+ spells in a single turn.
Play 5+ cards from NOT your hand or command zone in a single game.