Avandra's Deck of Many Things

Embossed with the symbol of Avandra, this deck contains a 22 cards made of ivory.  While you are attuned to the deck, you have the Cartomancer feat.  Cards may not be drawn from the deck by anyone unless the deck has been attuned to a cleric or paladin of Avandra, or unless a cleric or paladin of Avandra is attuning to the deck.

Before you draw a card, you must declare how many cards you intend to draw and then draw them randomly (you can use an altered deck of playing cards to simulate the deck). Any cards drawn in excess of this number have no effect. Otherwise, as soon as you draw a card from the deck, its magic takes effect. You must draw each card no more than 1 hour after the previous draw. If you fail to draw the chosen number, the remaining number of cards fly from the deck on their own and take effect all at once.

Once a card is drawn, it fades from existence. Unless the card is the Jester, the card reappears in the deck, making it possible to draw the same card twice.

* Found only in a deck with twenty-two cards

Undead. Somewhere on the Material Plane, a Death Knight rises. This knight is a former follower of the Changebringer, and relentlessly hunts you to exact its revenge against her. The knight exists until either 1 year passes, the revenant kills you, or you use a wish spell to banish it permanently to the afterlife.

Comet. Your Cartomancer Hidden Ace ability can be used to store Melf's Minute Meteors.

Freak. You gain the Unstable condition, bringing your Exhaustion to 3 until you complete three consecutive Long Rests without gaining any more Exhaustion between them. When the Unstable condition is lost, you become Altered and gain a physical, noticeable mutation at the DM's discretion.

Euryale. The card's medusa-like visage curses you. You take a −2 penalty on saving throws while cursed in this way. Only a god or the magic of The Fates card can end this curse.

The Fates. Reality's fabric unravels and spins anew, allowing you to avoid or erase one event as if it never happened. You can use the card's magic as soon as you draw the card or at any other time before you die.

Flames. A powerful devil becomes your enemy. The devil seeks your ruin and plagues your life, savoring your suffering before attempting to slay you. This enmity lasts until either you or the devil dies.

Rift. A rift into another plane erupts in the nearest town or city.  All of area's residents know that you are, in some way, responsible for the resulting disaster.

Gem. Twenty-five pieces of jewelry worth 2,000 gp each or fifty gems worth 1,000 gp each appear at your feet.

Idiot. Permanently reduce your Intelligence by 1d4 + 1 (to a minimum score of 1). You can draw one additional card beyond your declared draws.

Jester. Whenever you use the Hidden Ace ability of the Cartomancer Feat you can roll on the Wild Magic Surge table in The Player's Handbook, or you can draw two additional cards beyond your declared draws.

Key. A rare or rarer magic weapon with which you are proficient appears in your hands. The GM chooses the weapon.

Knight. You gain the service of a 4th-level fighter who appears in a space you choose within 30 feet of you. The fighter is of the same race as you and serves you loyally until death, believing the fates have drawn him or her to you. You control this character.

Moon. You are granted the ability to cast the wish spell 1d3 times.

Rogue. A nonplayer character of the GM's choice becomes hostile toward you. The identity of your new enemy isn't known until the NPC or someone else reveals it. Nothing less than a wish spell or divine intervention can end the NPC's hostility toward you.

Ruin. All forms of wealth that you carry or own, other than magic items, are lost to you. Portable property vanishes. Businesses, buildings, and land you own are lost in a way that alters reality the least. Any documentation that proves you should own something lost to this card also disappears.

Skull. You summon an avatar of death--a ghostly humanoid skeleton clad in a tattered black robe and carrying a spectral scythe. It appears in a space of the GM's choice within 10 feet of you and attacks you, warning all others that you must win the battle alone. The avatar fights until you die or it drops to 0 hit points, whereupon it disappears. If anyone tries to help you, the helper summons its own avatar of death. A creature slain by an avatar of death can't be restored to life.

Avatar of Death

Medium undead, neutral evil

Armor Class 20
Hit Points half the hit point maximum of its summoner
Speed 60 ft., fly 60 ft. (hover)

Damage Immunities necrotic, poison

Condition Immunities charmed, frightened, paralyzed, petrified, poisoned, unconscious

Senses darkvision 60 ft., truesight 60 ft., passive Perception 13

Languages all languages known to its summoner

Challenge -- (0 XP)

Incorporeal Movement. The avatar can move through other creatures and objects as if they were difficult terrain. It takes 5 (1d10) force damage if it ends its turn inside an object.
Turning Immunity. The avatar is immune to features that turn undead.

Actions

Reaping Scythe. The avatar sweeps its spectral scythe through a creature within 5 feet of it, dealing 7 (1d8 + 3) slashing damage plus 4 (1d8) necrotic damage.

Star. Increase one of your ability scores by 2. The score can exceed 20 but can't exceed 24.

Sun. A wondrous item (which the GM determines randomly) appears in your hands.

Talons. Every magic item you wear or carry disintegrates. Artifacts in your possession aren't destroyed but do vanish.

Throne. You gain proficiency in the Persuasion skill, and you double your proficiency bonus on checks made with that skill. In addition, you gain rightful ownership of a small keep somewhere in the world. However, the keep is currently in the hands of monsters, which you must clear out before you can claim the keep as yours.

Vizier. At any time you choose within one year of drawing this card, you can ask a question in meditation and mentally receive a truthful answer to that question. Besides information, the answer helps you solve a puzzling problem or other dilemma. In other words, the knowledge comes with wisdom on how to apply it.

The Crossroad. Roll a d20. If the roll is even, you age 1d10 years. If the roll is odd, you become younger by 1d10 years, to a minimum of 1 year. This effect can be undone only by the wish spell, divine intervention, or similar magic.

Notes: Feat: Choose a Feat, Cleric or Paladin of Avandra who tests their luck by drawing a card, Utility, Consumable