Keep an eye out for the keyword paradox that appreciates you casting cards from zones other than your hand, such as with suspend
Maybe the blue/red deck is fine with this because it costs 4 mana, but otherwise I think its too weak
A six mana investment on the front is well worth it, particularly as you can get him in for damage, pitch a spell to Connive, and flip him on the same turn
Put the rest on the bottom of your library in a random order. While three or less might not sound like much, MTG is full to bursting with cards which only cost three mana or less that can win a game
Ive already blown my one affinity joke, so lets get into this
The play pattern here is to get Vivi in play, pitch a huge red spell card to cast a free Blazing Shoal and make Vivi enormous, then use Vivi's ability to generate loads of free mana and cast more giant spells, storm off, or simply swing and deal heaps of damage to your opponent with the now embiggened mage