Activated abilities of artifacts your opponents control can't be activated.
+1: Until your next turn, up to one target noncreature artifact becomes an artifact creature with power and toughness each equal to its mana value.
−2: You may reveal an artifact card you own from outside the game or choose a face-up artifact card you own in exile. Put that card into your hand.

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

Creatures you control get +7/+7 until end of turn.

Whenever you gain life, target opponent loses that much life.

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

Noncreature spells with mana value 4 or greater can't be cast.
Noncreature spells with in their mana costs can't be cast.

Take an extra turn after this one.

Flying
Whenever you cast an instant or sorcery spell that targets a creature you control, exile that card instead of putting it into your graveyard as it resolves. If you do, return it to your hand at the beginning of the next end step.

Create a 2/1 white and black Inkling creature token with flying, a 3/2 red and white Spirit creature token, and a 4/4 blue and red Elemental creature token.

At the beginning of your upkeep, sacrifice this creature unless you sacrifice a Mountain.

Whenever this creature deals combat damage to a player, create a 1/1 colorless Sand creature token for each land you control.

This spell costs less to cast for each land your opponents control that could produce .
Flying
When this creature enters, destroy target nonbasic land an opponent controls.

Whenever a legendary creature you control with mana value 4 or greater enters, you become the monarch.
At the beginning of your end step, if you're the monarch, create two 1/1 white Human Soldier creature tokens.

Tap target creature you don't control.
Overload (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

Companion — Each permanent card in your starting deck has an activated ability. (If this card is your chosen companion, you may put it into your hand from outside the game for as a sorcery.)
Abilities you activate that aren't mana abilities cost less to activate. This effect can't reduce the mana in that cost to less than one mana.
, : Target creature can't block this turn.

Defender (This creature can't attack.)
Protection from black

Until end of turn, Wizards you control gain ": Counter target spell."

Whenever a creature without flying attacks you or a planeswalker you control, this enchantment deals 1 damage to that creature.

, : You may put a creature card from your hand onto the battlefield.

This land enters tapped unless you have two or more opponents.
: Add or .