Secluding Missionary
Creature - Human Cleric
When ~ enters the battlefield, creatures you control gain protection from target creature until end of turn.
2/2

Revered Tortoise
Creature—Turtle (C)
Sacrifice ~: Prevent the next 4 damage that would be dealt to you this turn.
Desert tortherds raise them for their meat, and are never caught without shelter in a sandstorm.
1/4

EDIT: cato is correct

Steinhauser, you should probably put a "this turn" clause at the end of your rules text, or there will be some terrible memory issues.

Unshakable Resolve |
Instant (C)
Target creature gains protection from the card type of your choice until end of turn.
"I may not know where I'm bound for, but I know nothing will keep me from getting there."
Volget, the Wanderer

Let's start the voting!










I vote for Echo_Robin.

I suggests Knifethrower and Echo_Robin combine their effects

I vote echo_robin.

Mown.

Echo_Robin

I vote for Mown's Secluding Missionary. A good aggressive option for white where the rest of the white commons are stall-focused.

Mown, Echo, and Steinhauser's submissions are all fantastic. Echo_Robin, though, I guess.

Mown

Mown's is great, but echo's conveys the set theme really nicely at common (you can include the list of card types for reference) while still being very simple and useable.

So, echo robin.

chinkeeyong

echo Robin's card is blue.

Final Tally:

Echo_Robin: 5.5
Mown: 3
CKY: 1

And Echo_Robin takes it! Unshakable Resolve shall be added to the spoiler!

Please pick a rarity and write a criterion for the next round.

Noncreature rare that interacts with at least one card type other than enchantments and creatures.

Hm, that would leave either artifacts, or instant/sorceries (probably through an indirect means, like "whenever an ins/sorc causes you to gain life/ make a token). I know, reprint Tempered Steel! [Gets beaten off by angry mob].
This will require some thought.

Glacial Prison
Enchantment (R)
When ~ enters the battlefield, exile target nonland permanent until ~ leaves the battlefield.
At the beginning of your upkeep, if a player has no cards in hand, sacrifice ~.
Here I lay, frozen in time
Until the mountain sheds its rime.
--Glacial inscription, origins unknown

Solar Flare
Instant (R)
Exile target nonland permanent with converted mana cost X. You gain X life.
Two clerics left the compound, questioning Elori's existence. A brilliant flash of light later, one cleric returned, his faith renewed.

I can brutally murder people in flavor texts, right?

Written into History -
Enchantment
Whenever a legendary permanent or planeswalker leaves the battlefield, you may exile ~ and return it to the battlefield as a copy of that legendary permanent or planeswalker except it is an enchantment in addition to its other card types.
Only the heroes and villains of war leave their footprint in history.

Hmm, come to think of it, don't think we even have enough legendaries and planeswalker to make this card work.

Reactive Barrier
Enchantment
Whenever a player casts a noncreature spell, put a barrier counter on ~, then counter that spell unless its controller pays for each barrier counter on ~.
"The more our faith is tested, the stronger it becomes."
-Esme, priestess of Elori