Unravel the Aether

Choose target artifact or enchantment. Its owner shuffles it into his or her library.

Mutavault

{T}: Add {1} to your mana pool. {1}: Mutavault becomes a 2/2 creature with all creature types until end of turn. It's still a land.

Knight of the White Orchid

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

Temple Garden

Canopy Vista

Thalia's Lieutenant

Heron's Grace Champion

Sunpetal Grove

Acclaimed Contender

When Acclaimed Contender enters the battlefield, if you control another Knight, look at the top five cards of your library. You may reveal a Knight, Aura, Equipment, or legendary artifact card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

The Circle of Loyalty

This spell costs {1} less to cast for each Knight you control. Creatures you control get +1/+1. Whenever you cast a legendary spell, create a 2/2 white Knight creature token with vigilance. {3}{W}, {T}: Create a 2/2 white Knight creature token with vigilance.

Venerable Knight

When Venerable Knight dies, put a +1/+1 counter on target Knight you control.

Worthy Knight

Whenever you cast a Knight spell, create a 1/1 white Human creature token.

Once Upon a Time

If this spell is the first spell you've cast this game, you may cast it without paying its mana cost. Look at the top five cards of your library. You may reveal a creature or land card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Castle Ardenvale

Castle Ardenvale enters the battlefield tapped unless you control a Plains. {T}: Add {W}. {2}{W}{W}, {T}: Create a 1/1 white Human creature token.

Plains

({T}: Add {W}.)