Daybound (If a player casts no spells during their own turn, it becomes night next turn.)

+1: Until your next turn, you may cast creature spells as though they had flash, and each creature you control enters the battlefield with an additional +1/+1 counter on it.

-3: Create two 2/2 green Wolf creature tokens.

Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)

+2: Add {R}{G}.

0: Until end of turn, Arlinn, the Moon's Fury becomes a 5/5 Werewolf creature with trample, indestructible, and haste.

You may look at the top card of your library any time.

You may play lands from the top of your library.

Coven -- As long as you control three or more creatures with different powers, you may cast creature spells from the top of your library.

(Gain the next level as a sorcery to add its ability.)

Legendary creatures you control enter the battlefield with an additional +1/+1 counter on them.

{R}{G}: Level 2

Legendary spells you cast cost {R}{G} less to cast. This effect reduces only the amount of colored mana you pay.

{3}{R}{G}: Level 3

Whenever you cast a legendary spell, exile the top two cards of your library. You may play them this turn.

If you control two or more other lands, Den of the Bugbear enters the battlefield tapped.

{T}: Add {R}.

{3}{R}: Until end of turn, Den of the Bugbear becomes a 3/2 red Goblin creature with "Whenever this creature attacks, create a 1/1 red Goblin creature token that's tapped and attacking." It's still a land.

Return target card from your graveyard to your hand.

Flashback {4}{G} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

{T}, Sacrifice Evolving Wilds: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Flash

Enchant creature

When Howl of the Hunt enters the battlefield, if enchanted creature is a Wolf or Werewolf, untap that creature.

Enchanted creature gets +2/+2 and has vigilance.

Whenever Kessig Naturalist attacks, add {R} or {G}. Until end of turn, you don't lose this mana as steps and phases end.

Daybound (If a player casts no spells during their own turn, it becomes night next turn.)

Other Wolves and Werewolves you control get +1/+1.

Whenever Lord of the Ulvenwald attacks, add {R} or {G}. Until end of turn, you don't lose this mana as steps and phases end.

Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)

If you control two or more other lands, Lair of the Hydra enters the battlefield tapped.

{T}: Add {G}.

{X}{G}: Until end of turn, Lair of the Hydra becomes an X/X green Hydra creature. It's still a land. X can't be 0.

{2}, {T}, Sacrifice a creature: Search your library for a creature card that shares a creature type with the sacrificed creature and has mana value equal to 1 plus that creature's mana value. Put that card onto the battlefield, then shuffle. Activate only as a sorcery.

At the beginning of combat on your turn, target creature you control gets +1/+0 and gains haste until end of turn.

Daybound (If a player casts no spells during their own turn, it becomes night next turn.)

At the beginning of combat on your turn, target creature you control gets +2/+0 and gains trample and haste until end of turn.

Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)

Rockfall Vale enters the battlefield tapped unless you control two or more other lands.

{T}: Add {R} or {G}.

If it's neither day nor night, it becomes day as The Celestus enters the battlefield.

{T}: Add one mana of any color.

{3}, {T}: If it's night, it becomes day. Otherwise, it becomes night. Activate only as a sorcery.

Whenever day becomes night or night becomes day, you gain 1 life. You may draw a card. If you do, discard a card.

When Tovolar's Huntmaster enters the battlefield, create two 2/2 green Wolf creature tokens.

Daybound (If a player casts no spells during their own turn, it becomes night next turn.)

Whenever Tovolar's Packleader enters the battlefield or attacks, create two 2/2 green Wolf creature tokens.

{2}{G}{G}: Another target Wolf or Werewolf you control fights target creature you don't control.

Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)

Whenever a Wolf or Werewolf you control deals combat damage to a player, draw a card.

At the beginning of your upkeep, if you control three or more Wolves and/or Werewolves, it becomes night. Then transform any number of Human Werewolves you control.

Daybound

Whenever a Wolf or Werewolf you control deals combat damage to a player, draw a card.

{X}{R}{G}: Target Wolf or Werewolf you control gets +X/+0 and gains trample until end of turn.

Nightbound

At the beginning of each combat, double the power and toughness of each creature you control until end of turn.

Pack tactics -- Whenever Werewolf Pack Leader attacks, if you attacked with creatures with total power 6 or greater this combat, draw a card.

{3}{G}: Until end of turn, Werewolf Pack Leader has base power and toughness 5/3, gains trample, and isn't a Human.