Proxum, Weaver Of Belief

If you pick this as your commander, these effects
are granted before you draw your 7 starting cards:
•Spell's mana costs are equal to their converted
mana cost.
•Each player searches their deck for a card and
puts it in their hand. At the beginning of your
upkeep, if a player has the chosen card in their
hand, they can't lose life during their main phases
that turn.