Combos Utilizing Attunement

use the attunement to get a lot of enchantments to your graveyaed and then use replenish and get a lot of creatures from your enchantments using opalescence and then use the creatures with opposition

return attunement to your hand to draw 3 cards. use strength of isolation & lunacy as your forced discards. pay madness on them and put them into play instead on into your graveyard

return attunement to your hand to draw 3 cards. use violent eruption & fiery temper as your forced discards. pay madness on them to do 7 damage on your opponent

have replenish in hand, opalescence in play with angelic chorus, play attunement and discard ALL of your enchantments, use replenish, gain a ton of life, use purify, do it again and again and again...

Instead of drawing 3 cards, put 3 study counters on Pursuit. Sac Prusuit of knowledge and draw 7 cards. You still must discard 4 cards

return attunement to your hand to draw 3 cards. use basking rootwalla & arrogant wurm as your forced discards. pay madness on them and put them into play instead on into your graveyard

Dump enchantments like bargain, greater good, and delusions of mediocrity then Replenish would bring them all in play.

use some discardcards like attunement to get the saproling burst and pandemonium in your graveyard, then cast replensh to do 21 damage.