Roar of the Fifth People makes you bodies, ramps you, tutors a dinosaur and then just kills your opponents
But the overall principle is to run just enough to reliably hit your early plays , then let your low curve and card advantage carry you the rest of the way
Thats not to say it isnt doable, but the more lands you have in your deck that dont produce White, the worse a card like Anti-Venom becomes
If a spell or ability you control has one or more of its targets changed to a creature you control with a valiant ability, that ability will trigger if that creature hasn't yet been the target of a spell or ability you control this turn
Kairi is absolutely worth the six-mana cost, being huge, difficult to kill, and providing either the return of two key spells or all of your opponents' best stuff whenever it does finally die
Its a very effective way to control their draws, so its only been printed on two cards: Mesmeric Sliver and Spin into Myth