Whats neat about Lightning is that she enables this not only through opponents attacking that player, but also through spells and abilities used in your second main phase (or an opponents turn), but also and this is key on regular damage after first strike damage
I think this is a fun almost reverse Rakdos, Lord of Riots, where you want to force people to sacrifice things to chuck him on the board for cheap and beat face as a win condition
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In addition, the green dot has to be surrounded by a saturated black circle
What's not to like about an enchantment that can stop attackers, save your blockers, make your creatures invulnerable to removal, give you free morphing, and allow recursion of comes-into-play abilities -- for free
I'm going to leave it there for now, but in truth I could go on and on and on with this