Hidden agenda (Start the game with this conspiracy face down in the command zone and secretly choose a card name. You may turn this conspiracy face up any time and reveal that name.)
Whenever you cast an instant or sorcery spell, if it targets a creature you control with the chosen name, you may copy that spell and may choose new targets for the copy.

Choose one —
• Put two +1/+1 counters on target creature.
• Exile target creature with power 2 or less.
• Each opponent loses 3 life and you gain 3 life.

(: Add or .)
This land enters tapped.

Put X +1/+1 counters on target creature you control. It deals damage equal to its power to each other creature.

Prevent all combat damage that would be dealt this turn.

Landfall — Whenever a land you control enters, you may pay . If you do, draw a card.

: For each kind of counter on target permanent or player, give that permanent or player another counter of that kind. Activate only as a sorcery.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)
Creatures you control get +3/+3 until end of turn.

Prevent all damage that would be dealt this turn to creatures you control.

This spell costs less to cast if a player attacked you during their last turn.
Destroy all creatures. You gain 1 life for each creature destroyed this way.

Reach, deathtouch
Landfall — Whenever a land you control enters, this creature gets +1/+1 until end of turn.

Flying (This creature can't be blocked except by creatures with flying or reach.)
Vigilance (Attacking doesn't cause this creature to tap.)
Other creatures you control have vigilance.

Unleash (You may have this creature enter with a +1/+1 counter on it. It can't block as long as it has a +1/+1 counter on it.)

This artifact enters with three charge counters on it.
, , Remove a charge counter from this artifact: Destroy target creature. Its controller creates a 2/4 white Ox creature token. Activate only as a sorcery.

: Choose a player. That player adds one mana of any color they choose.

Commander creatures you own have "Whenever one or more creatures you control deal combat damage to a player, goad target creature that player controls." (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.)

Exile target creature you control, then return it to the battlefield under its owner's control.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

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Draw a card. Clash with an opponent. If you win, return Research the Deep to its owner's hand. (Each clashing player reveals the top card of their library, then puts that card on their choice of the top or bottom. A player wins if their card had a greater mana value.)

Whenever a token you control leaves the battlefield, each opponent loses 1 life and you gain 1 life.