White spells you cast cost less to cast.

Flying
Whenever a player casts their second spell each turn, this creature connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.)

Enchant creature
: Untap enchanted creature.
: Enchanted creature gains flying until end of turn.
: Enchanted creature gains shroud until end of turn. (It can't be the target of spells or abilities.)
: Enchanted creature gets +1/-1 or -1/+1 until end of turn.

: Another target creature you control gains protection from colorless or from the color of your choice until end of turn.

Equipped creature has ": Add one mana of any color."
Equip

Whenever you cast a creature spell, put X +1/+1 counters on target creature you control, where X is that spell's mana value.
Landfall — Whenever a land you control enters, create a 2/2 green Bear creature token.

Each nonland card in your graveyard has escape. The escape cost is equal to the card's mana cost plus exile three other cards from your graveyard. (You may cast cards from your graveyard for their escape cost.)
At the beginning of the end step, sacrifice this enchantment.

Whenever a player casts a spell, if no mana was spent to cast it, counter that spell.
, , Sacrifice this artifact: Draw a card.

Trample
Other Bears you control get +2/+2.
At the beginning of combat on your turn, put a trample counter on up to one target creature you control. It becomes a Bear in addition to its other types. Then if you control three or more Bears, draw two cards.

You may sacrifice a nontoken white creature rather than pay this spell's mana cost.
Until end of turn, your life total can't change, and permanents you control gain hexproof and indestructible.

When this creature enters, search your library for any number of Goblin cards, reveal them, then shuffle and put those cards on top in any order.

Reach, vigilance
If you would draw a card except the first one you draw in each of your draw steps, draw two cards instead.
If one or more tokens would be created under your control, twice that many of those tokens are created instead.

Trample
When Thorin enters, attach any number of target Equipment you control to target creature you control. When one or more Equipment become attached to that creature this way, that creature deals damage equal to its power to up to one target creature.

Whenever an artifact you control enters, draw a card.

Choose up to one target creature, then airbend all other creatures. (Exile them. While each one is exiled, its owner may cast it for rather than its mana cost.)
Until your next turn, your opponents can't cast spells from anywhere other than their hands.
Exile Avatar's Wrath.

Sneak (You may cast this spell for if you also return an unblocked attacker you control to hand during the declare blockers step. He enters tapped and attacking.)
Whenever Michelangelo deals combat damage to a player, you may put a creature card and/or a land card from your hand onto the battlefield.

Equipped creature has prowess. (Whenever its controller casts a noncreature spell, that creature gets +1/+1 until end of turn.)
If a triggered ability of equipped creature triggers, that ability triggers an additional time.
Equip Wizard
Equip

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.)
I — Destroy up to one target nonland permanent.
II, III — Each opponent loses 2 life.
IV — Create Galactus, a legendary 16/16 black Elder Alien creature token with flying, trample, and "Whenever Galactus attacks, destroy target land."

Whenever a token you control enters, you gain 1 life if this is the first time this ability has resolved this turn. If it's the second time, draw a card. If it's the third time, put a +1/+1 counter on each creature you control.

Whenever an opponent casts a spell, you may reveal the top card of your library. If you do, counter that spell if it has the same mana value as the revealed card.