Steel Seraph automatically comes with flying, so even if its your only creature in play, you can at least push some damage through with its solid stats and evasion
Well, blue does have some really good artifact synergies, and I do like artifact shenanigans
I love me some cycles, especially ones that are powerful, and luckily, these crystals fit the bill
Great for aggro, landfall, tokens, +1/+1 counter decks all of those are mega-popular in multiplayer so grab this last entry and then add it to like half of your Green decks moving forward
The damage mode and the Shatter mode both exile, which can be a big deal if it's lining up against something like The One Ring outside of Standard
Its desire for creatures with high power fits nicely with green, and the strong enters ability pairs well with blues many flicker effects