Plains

Kor Haven

{T}: Add {C}.
{1}{W}, {T}: Prevent all combat damage that would be dealt by target attacking creature this turn.

Ironfist Crusher

Ironfist Crusher can block any number of creatures.
Morph {3}{W} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

Peace Talks

This turn and next turn, creatures can't attack, and players and permanents can't be the targets of spells or activated abilities.

Inviolability

Enchant creature
Prevent all damage that would be dealt to enchanted creature.

Woolly Razorback

Woolly Razorback enters with three ice counters on it.
As long as Woolly Razorback has an ice counter on it, prevent all combat damage it would deal and it has defender.
Whenever Woolly Razorback blocks, remove an ice counter from it.

Guardian of the Gateless

Flying
Guardian of the Gateless can block any number of creatures.
Whenever Guardian of the Gateless blocks, it gets +1/+1 until end of turn for each creature it's blocking.

Hold the Line

Blocking creatures get +7/+7 until end of turn.

Fight or Flight

At the beginning of combat on each opponent's turn, separate all creatures that player controls into two piles. Only creatures in the pile of their choice can attack this turn.

Luminarch Ascension

At the beginning of each opponent's end step, if you didn't lose life this turn, you may put a quest counter on Luminarch Ascension. (Damage causes loss of life.)
{1}{W}: Create a 4/4 white Angel creature token with flying. Activate only if Luminarch Ascension has four or more quest counters on it.

Floating Shield

Enchant creature
As Floating Shield enters, choose a color.
Enchanted creature has protection from the chosen color. This effect doesn't remove Floating Shield.
Sacrifice Floating Shield: Target creature gains protection from the chosen color until end of turn.

Smite

Gossamer Chains

Return Gossamer Chains to its owner's hand: Prevent all combat damage that would be dealt by target unblocked creature this turn.

Angelic Arbiter

Flying
Each opponent who cast a spell this turn can't attack with creatures.
Each opponent who attacked with a creature this turn can't cast spells.