Such a huge and fundamental change to a mechanic is so rare that Companion continues to be one of the most controversial things added to Magic in the last few years, and regularly comes up as a point of discussion when talking about errata
Use the power of the sacrificed Snail as it last existed on the battlefield to determine how much damage to deal and how many cards to draw
If you're able to steal a hefty spell with Willbender or Kheru Spellsnatcher or just counter a spell that would have ended the game with Stratus Dancer and you might see why some of these morphs are played outside of Animar, Soul of Elements, Ezuri, Claw of Progress and a few other decks
Wings of the Cosmos can target a creature that's already untapped
At the beginning of each opponents upkeep, this enchantment deals damage to that player equal to the number of cards in that players hand
Most importantly, though Sphere Grid both grows your creatures and gives creatures with +1/+1 counters reach and trample