Destroy target artifact or enchantment. You may put a land card from your hand onto the battlefield.

Protection from blue

Target creature gets +2/+2 and gains flying until end of turn.

Flying
When this creature enters, return a blue or black creature you control to its owner's hand.
Pay 1 life: Return this creature to its owner's hand.

Enchant creature
Enchanted creature gets +2/+2 as long as it's a Human. Otherwise, it can't attack or block.

Enchant creature you control
When this Aura enters, enchanted creature fights up to one target creature you don't control. (Each deals damage equal to its power to the other.)
Enchanted creature gets +0/+2.

Destroy target creature. It can't be regenerated.

Target creature you control gets +0/+3 and gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)

Equipped creature gets +1/+1.
Whenever equipped creature deals combat damage to a player, create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Extort (Whenever you cast a spell, you may pay . If you do, each opponent loses 1 life and you gain that much life.)

: Add .

Each opponent sacrifices a creature of their choice with flying.

Kicker (You may pay an additional as you cast this spell.)
When this creature enters, if it was kicked, return target instant or sorcery card from your graveyard to your hand.

Kicker (You may pay an additional as you cast this spell.)
When this creature enters, if it was kicked, each opponent discards two cards.

Target creature gets +1/+0 and gains first strike until end of turn.
Draw a card.

When this creature enters, mill three cards. You may put a land card from among the cards milled this way into your hand. If you don't, put a +1/+1 counter on this creature. (To mill a card, put the top card of your library into your graveyard.)

Defender (This creature can't attack.)
, Sacrifice this creature: Destroy target creature this creature is blocking.

: Add one mana of any color that a land you control could produce.

Target creature gets -3/-0 until end of turn.
Target creature gets -0/-3 until end of turn.

Enchant land
When this Aura enters, draw a card.
Enchanted land is every basic land type in addition to its other types.

: Add .
Put a -1/-1 counter on this creature: Untap this creature.

Flying
: This creature gets +1/-1 until end of turn.

This creature gets +1/+0 for each other Rat you control.
A deck can have any number of cards named Rat Colony.

Target player sacrifices a creature of their choice.

When this creature enters, look at the top three cards of your library. You may reveal an instant or sorcery card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

, , Sacrifice this artifact: Search your library for up to two basic land cards, reveal them, put them into your hand, then shuffle.

Pierce the Sky deals 7 damage to target creature with flying.

Kicker (You may pay an additional as you cast this spell.)
Create two 1/1 green Saproling creature tokens. If this spell was kicked, create four of those tokens instead.

Flying
: Add one mana of any color.

Choose one —
• Destroy target artifact.
• Destroy target enchantment.
• Exile target card from a graveyard.

Tap target creature.
Draw a card.

Switch target creature's power and toughness until end of turn.
Draw a card.

As an additional cost to cast this spell, sacrifice a creature.
You gain life equal to the sacrificed creature's toughness. Destroy target creature an opponent controls.

, Sacrifice this enchantment: Target opponent exiles two cards from their hand. Activate only as a sorcery.