Destroy target creature with power 4 or greater.
Investigate.(Create a Clue token. It's an artifact with ", Sacrifice this token: Draw a card.")

Defender
, Sacrifice a creature: You gain 1 life and draw a card.

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Target creature gains deathtouch and indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

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Emerge from artifact (You may cast this spell by sacrificing an artifact and paying the emerge cost reduced by that artifact's mana value.)
When this creature enters, target opponent exiles the top card of their library, a card at random from their graveyard, and a card at random from their hand. You may cast a spell from among cards exiled this way without paying its mana cost.

Spitting Earth deals damage to target creature equal to the number of Mountains you control.

: This enchantment becomes an X/X Wall creature with defender in addition to its other types until end of turn.

This artifact enters with three loyalty counters on it.
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Whenever a planeswalker you control enters, if this artifact has loyalty counters on it, you may move a loyalty counter from this artifact onto that planeswalker.

Menace
Whenever you expend 4, you may discard your hand. If you do, draw two cards. (You expend 4 as you spend your fourth total mana to cast spells during a turn.)

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: This land becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land.
, : Target attacking Assembly-Worker gets +2/+2 until end of turn.

Destroy target creature. Consign to the Pit deals 2 damage to that creature's controller.

This land enters tapped.
When this land enters, return a land you control to its owner's hand.
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Destroy target artifact or creature. It can't be regenerated.

Flying
Whenever this creature attacks, target creature defending player controls loses all abilities and has base power and toughness 0/1 until end of turn.

Changeling (This card is every creature type.)
Creatures target player controls get -2/-0 and lose all creature types until end of turn.

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Flying
When this creature enters, you may cast an instant or sorcery spell with mana value less than or equal to the number of Spirits you control from a graveyard without paying its mana cost. If that spell would be put into a graveyard, exile it instead.

Affinity for Knights (This spell costs 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.
, : Create a 2/2 white Knight creature token with vigilance.