At the beginning of your upkeep, sacrifice Sunken City unless you pay .
Blue creatures get +1/+1.

Enchant land
Enchanted land has ": Counter target spell unless its controller pays ."

At the beginning of each player's upkeep, that player returns a creature they control to its owner's hand.

Sunlance deals 3 damage to target nonwhite creature.

As long as it's your turn, Sunlit Hoplite has first strike.
Sunlit Hoplite gets +1/+0 as long as you control an Elspeth planeswalker.

Flying
: Sunmane Pegasus gains vigilance and lifelink until end of turn.

Vigilance
When Sunrise Seeker enters the battlefield, it explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)

Defender (This creature can't attack.)
Green spells and blue spells you cast cost less to cast.

Flying
Whenever an opponent casts a spell, put a +1/+1 counter on Sunscorch Regent and you gain 1 life.

When Sunscorched Desert enters the battlefield, it deals 1 damage to target player or planeswalker.
: Add .

You may exile two white cards from your hand rather than pay this spell's mana cost.
Destroy all creatures.

When Sunscourge Champion enters the battlefield, you gain life equal to its power.
Eternalize—, Discard a card. (, Discard a card, Exile this card from your graveyard: Create a token that's a copy of it, except it's a 4/4 black Zombie Human Wizard with no mana cost. Eternalize only as a sorcery.)

At the beginning of your end step, if you control a creature with power 5 or greater, you may gain 2 life.
: Add .

Sunset Pyramid enters the battlefield with three brick counters on it.
, , Remove a brick counter from Sunset Pyramid: Draw a card.
, : Scry 1.

As long as Sunspear Shikari is equipped, it has first strike and lifelink.

When Sunspire Gatekeepers enters the battlefield, if you control two or more Gates, create a 2/2 white Knight creature token with vigilance.

Flying

Landfall — Whenever a land enters the battlefield under your control, you may put a quest counter on Sunspring Expedition.
Remove three quest counters from Sunspring Expedition and sacrifice it: You gain 8 life.

, Sacrifice a snow land: Prevent all combat damage that would be dealt this turn.

Sunstrike Legionnaire doesn't untap during your untap step.
Whenever another creature enters the battlefield, untap Sunstrike Legionnaire.
: Tap target creature with converted mana cost 3 or less.