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First strike, protection from loose lips (Nothing with an open mouth in its artwork can block, target, deal damage to, or attach to this creature.)

First strike, protection from odd collector numbers (Nothing with an odd collector number can block, target, deal damage to, or attach to this creature.)

First strike, protection from two-word names (Nothing with exactly two words in its name can block, target, deal damage to, or attach to this creature. Hyphenated words are one word.)

First strike, protection from watermarks (Nothing with a watermark can block, target, deal damage to, or attach to this creature.)

Vigilance
When Knight of the New Coalition enters, create a 2/2 white and blue Knight creature token with vigilance.

Renown 1

{3}{G}: Knight of the Skyward Eye gets +3/+3 until end of turn. Activate only once each turn.

Vigilance

First strike
When Knight of the White Orchid enters, if an opponent controls more lands than you, you may search your library for a Plains card, put it onto the battlefield, then shuffle.

Vigilance
Knight of the Widget's power and toughness are each equal to the number of Order of the Widget watermarks among permanents you control.

Enchant creature
Enchanted creature gets +2/+2.

When Knight-Captain of Eos enters, create two 1/1 white Soldier creature tokens.
{W}, Sacrifice a Soldier: Prevent all combat damage that would be dealt this turn.

Convoke
When Knight-Errant of Eos enters, look at the top six cards of your library. You may reveal up to two creature cards with mana value X or less from among them, where X is the number of creatures that convoked Knight-Errant of Eos. Put the revealed cards into your hand, then shuffle.

{2}{W}: Adapt 1.
Whenever one or more +1/+1 counters are put on Knighted Myr, it gains double strike until end of turn.

Creatures you control have first strike.

Enchant creature
When Knightly Valor enters, create a 2/2 white Knight creature token with vigilance.
Enchanted creature gets +2/+2 and has vigilance.

Protection from red; banding

This spell costs {2} less to cast if it targets a red creature.
Knockout Blow deals 4 damage to target attacking or blocking creature and you gain 2 life.

This spell costs {2} less to cast if it targets a red creature.
Destroy target tapped creature. You gain 2 life.

Bushido 1
As long as you control a legendary Samurai, Konda's Hatamoto gets +1/+2 and has vigilance.

Vigilance, indestructible
Bushido 5

{T}: Kongming's Contraptions deals 2 damage to target attacking creature. Activate only during the declare attackers step and only if you've been attacked this step.

Other creatures you control get +1/+1.

Kicker {1}{W}
Flying
When Kor Aeronaut enters, if it was kicked, target creature gains flying until end of turn.

Double strike
Equipped Warriors you control have double strike.