The situation at hand makes it hard to "win" when buying cards right when a new set comes out
Because damage remains marked on a creature until the damage is removed as the turn ends, nonlethal damage dealt to a creature may become lethal if you switch its power and toughness during that turn
Similarly, if the target creature or planeswalker is an illegal target by the time the ability tries to resolve, the ability won't resolve and you won't gain 4 life
(It's an artifact with ", , Sacrifice this token: You gain 3 life.") Whenever you create a token, put a +1/+1 counter on target creature you control other than Rosie Cotton
With Ajani, the Slasher takes the opponent from 20 life to three life: Slasher deals two, putting the opponent to 18
To many players, it looked like Wizards had just used the much-hyped ban announcement as additional marketing for their new packs