Target creature gains deathtouch until end of turn.
Draw a card.

Target creature gets -3/-3 until end of turn.
Hellbent — That creature gets -13/-13 until end of turn instead if you have no cards in hand.

Reach
Whenever another nontoken creature you control dies, you may reveal cards from the top of your library until you reveal a creature card. Put that card into your hand and the rest on the bottom of your library in a random order.

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Creatures can't attack a player unless that player cast a spell or put a nontoken permanent onto the battlefield during their last turn.

Put target creature or land on top of its owner's library.

Flash
When this creature enters, it connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.)

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.)

Flying
At the beginning of your upkeep, you lose 1 life.

As an additional cost to cast this spell, discard a card.
Draw two cards and create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")

Whenever this creature attacks, it gets +1/+0 until end of turn for each Elemental you control.

: Add .
, : Create a 1/1 green Saproling creature token.

Look at the top X cards of your library, where X is three plus the number of creatures in your party. Put three of those cards into your hand and the rest on the bottom of your library in a random order. (Your party consists of up to one each of Cleric, Rogue, Warrior, and Wizard.)

This land enters tapped.
: Add , , or .

+2: Until your next turn, up to two target creatures each have base power and toughness 0/3 and lose all abilities.
−2: Target player draws two cards. Until your next turn, instant, sorcery, and planeswalker spells that player casts cost less to cast.
−8: Target player gets an emblem with "Whenever you cast an instant or sorcery spell, copy it. You may choose new targets for the copy."
Partner with Rowan Kenrith
Will Kenrith can be your commander.

: Add one mana of any color.
Corrupted — Whenever this artifact becomes tapped, each opponent who has three or more poison counters loses 1 life.

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for .)
Trample, haste

Target creature gets +2/+0 and gains deathtouch until end of turn.
Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)

, , Sacrifice this artifact: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

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