Reveal the top four cards of your library. You may put a creature card from among them onto the battlefield. It gains "At the beginning of your end step, return this creature to its owner's hand." Then put the rest of the cards revealed this way on the bottom of your library in any order.

Whenever a creature you control attacks, it gets +2/+0 until end of turn and Anthem of Rakdos deals 1 damage to you.
Hellbent — As long as you have no cards in hand, if a source you control would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.

Graft 2 (This creature enters the battlefield with two +1/+1 counters on it. Whenever another creature enters the battlefield, you may move a +1/+1 counter from this creature onto it.)
: Target creature with a +1/+1 counter on it gains reach until end of turn. (It can block creatures with flying.)

Flying, trample

, Sacrifice Aurora Eidolon: Prevent the next 3 damage that would be dealt to any target this turn.
Whenever you cast a multicolored spell, you may return Aurora Eidolon from your graveyard to your hand.

( can be paid with either or .)
Flying
When Avatar of Discord enters the battlefield, sacrifice it unless you discard two cards.

Whenever a permanent is returned to your hand, you may pay . If you do, draw a card.

Azorius Chancery enters the battlefield tapped.
When Azorius Chancery enters the battlefield, return a land you control to its owner's hand.
: Add .

Flying, protection from enchantments

: Tap target creature.
: Counter target activated ability. (Mana abilities can't be targeted.)

Azorius Herald can't be blocked.
When Azorius Herald enters the battlefield, you gain 4 life.
When Azorius Herald enters the battlefield, sacrifice it unless was spent to cast it.

Prevent all combat damage target creature would deal this turn.
Prevent all combat damage that would be dealt to target creature this turn.

, : Add .

Flying
Whenever Beacon Hawk deals combat damage to a player, you may untap target creature.
: Beacon Hawk gets +0/+1 until end of turn.

Draw a card for each creature target player controls, then draw a card for each creature another target player controls.

Enchant creature
Enchanted creature gets +1/+1 for each of its colors.

(: Add or .)
As Blood Crypt enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

As an additional cost to cast this spell, pay X life.
Each other player loses X life.

Sacrifice a creature. Return up to X cards from your graveyard to your hand, where X is the number of colors that creature was. Exile this card.

Prevent all damage that would be dealt to target multicolored creature this turn. For each 1 damage prevented this way, put a +1/+1 counter on that creature.