First strike is a marginal ability that requires blocking to begin with (on one side or the other) and requires that you have more power than the opponent has toughness to even matter (give or take the stray dealing of first strike damage followed by a removal spell)
If that creature dies this way, its controller creates two tokens that are copies of that creature, except their base power is half that creature's power and their base toughness is half that creature's toughness
That said, the transformed side of flipwalker Sorin has one of the most threatening uses of lifegain that isn't an infinite combo in the -1 ability
Typhlosion 17 (Holographic): This card has become infamous for its scarcity in mint condition, with very few copies receiving top grades
Longshots effects are much more open-ended than these cards typically are, caring about all noncreature spells and not just instants/sorceries
Into the Story Fact or Fiction has had kind of legendary status as the best four-mana instant-speed card draw spell, even though it doesnt technically draw cards