You just need some way to gain life or make an opponent lose life, and it's game over
And since its initial printing in 1998, Fling has been printed an additional 15 times, while Magic has only added 16 new Flinging cards
Card draw for playing the game is the dream, and Akiri gives you this
Molimo, Maro-Sorcerer From 10th Edition Rare Trample (If this creature would assign enough damage to its blockers to destroy them, you may have it assign the rest of its damage to defending player or planeswalker.) Molimo, Maro-Sorcerer's power and toughness are each equal to the number of lands you control
Commissar Severina Raine addresses this by causing all your opponents to lose life in the combat phase, regardless of whos getting attacked
Kiln Fiend Kiln Fiend used to be a staple in Pauper burn decks and personally I think its still fighting the good fight