The best cards for Standard are very pushed, do something the format lacks, or add to existing decks
For Bracket 4, you'll probably want to aim for something like "
Afterwards, everyone opens their second pack, picks a card from it, passes it to their neighbor, and so on
Add in the number of useful enchantments which can easily be cycled (including Cast Out, Shark Typhoon, and Decree of Silence), and you can appreciate the kind of power Replenish unlocks
For just one mana, the Doctors mechanical mutt adds a nice layer of protection to all of your other legends, while also giving you the option to slip them through the enemy lines with his activated ability
Of all the colorless spells MTG offers for token protection, this is among the best