When this creature enters, you may have target creature get -1/-1 until end of turn.

: Add .
, : Create a tapped Vibranium token. (It's an artifact with indestructible and ": Add . This mana can't be spent to cast a nonartifact spell.")
, : Draw a card.

Flying
Whenever you draw a card, Niv-Mizzet deals 1 damage to any target.
: Draw a card.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I — Exile the top four cards of your library. Until the end of your next turn, you may play those cards.
II, III — Whenever you cast a spell this turn, put a +1/+1 counter on target creature you control.

: Add .
: This land becomes a 4/3 creature with vigilance and all creature types until end of turn. It's still a land. ( can be paid with one mana from a snow source.)

Spells and abilities your opponents control can't cause you to discard cards or sacrifice permanents.
+1: Choose a nonland card name, then reveal the top four cards of your library. Put all cards with the chosen name from among them into your hand and the rest into your graveyard.
−3: Return target card from your graveyard to your hand.

, Sacrifice this creature: Counter target noncreature spell unless its controller pays .
Disturb (You may cast this card from your graveyard transformed for its disturb cost.)

Destroy target creature. Its owner gains 4 life.

: Add one mana of any color.
Daybound (If a player casts no spells during their own turn, it becomes night next turn.)

, Sacrifice this creature: Counter target noncreature spell unless its controller pays .
Disturb (You may cast this card from your graveyard transformed for its disturb cost.)

When this creature enters, put a +1/+1 counter on each other Human you control.
Whenever another Human you control enters, put a +1/+1 counter on this creature.

You don't lose the game for having 0 or less life.
As long as you have 0 or less life, all damage is dealt to you as though its source had infect. (Damage is dealt to you in the form of poison counters.)

When this enchantment enters, exile all graveyards.
If a card or token would be put into a graveyard from anywhere, exile it instead.

Flash
Enrage — Whenever this creature is dealt damage, put a +1/+1 counter on it. (It must survive the damage to get the counter.)

When this enchantment enters, exile all graveyards.
If a card or token would be put into a graveyard from anywhere, exile it instead.

(: Add .)

Flying
Whenever this creature attacks, it gets +1/+1 until end of turn for each other attacking Ally.

, , Sacrifice this artifact: Search your library for an Island card, a Swamp card, and a Mountain card. Reveal those cards, put them into your hand, then shuffle.

Enchant instant card in a graveyard
Whenever you cast a sorcery spell, copy the enchanted instant card. You may cast the copy without paying its mana cost. If you do, exile the enchanted card and attach this Aura to another instant card in a graveyard.

As an additional cost to cast this spell, sacrifice a creature.
Flying, trample