The four-cost White one will protect you and the team for the turn by giving them hexproof and indestructible
This is especially true when you have no mana floating, and/or have used multiple Lotus Petals already
episode from last Thursday: Creatures (23) 4 Llanowar Elves 3 Shanna, Sisay's Legacy 3 Shalai, Voice of Plenty 4 Emmara, Soul of the Accord 4 District Guide 3 Venerated Loxodon 2 Trostani Discordant Lands (22) Spells (15) This deck is capable of some very powerful openings, but its not blindly aggressive, with plenty of staying power through to the lategame
Maraxus AND Serra Each gives you an extra card, pumps your dorks and gains you life
Mirrodins (2003) Card not found gives you five cards for five mana, which is very efficient, when taking into account the card you have to use to get the effect