Yeah, my intention was for it to be something like dungeons or attractions. You'd start with a semi-random deck of quests and at the beginning of the game, you'd reveal the top three of them to form a "job board". Whenever a card allows you to accept a quest, you'd pick one of them and replace it on the board with the top card of your quest deck. Completing a quest puts it on the bottom of the quest deck.

Stoneforge Armorer

Creature -- Kor Artificer Ally (R)
When Stoneforge Armorer enters the battlefield, you may accept a quest. (If you do, abandon any other quests you have accepted.)
Whenever you complete a quest, you may search your library for an Equipment card, put it onto the battlefield attached to a creature you control, then shuffle.
3/3

To be fair, the original incarnation of quests in the original Zendikar block were enchantments, and we're probably only enchantments due to extra decks like Contraptions and Dungeons not being explored at all yet.

Adventuring License
Artifact - Equipment
Whenever you accept a quest, equipped creature gains hexproof and indestructible until end of turn.
Whenever you complete a quest, put a +1/+1 counter on equipped creature.
Equip

I like that idea. I'll redesign mine to fit that.

Umara Expedition House
Land
Umara Expedition House enters the battlefield tapped.
When Umara Expedition House enters the battlefield, accept a quest.
: Add .

Next is Innistrad.

Bladewise Cathar

Creature -- Human Knight (U)
First strike
Deathtouch to Vampires, Werewolves, Spirits, and Zombies (Any amount of damage this deals to creatures of those types is lethal.)
3/2

Amateurish Stitcher —
Creature — Human Wizard (R)
, : Return target creature from your graveyard to the battlefield tapped with a decayed counter on it.
2/2

Spat from the Ashmouth
Sorcery
As an additional cost to cast this spell, sacrifice a creature.
Reveal cards from the top of your library until you reveal a creature card. Put that card onto the battlefield and the rest on the bottom of your library in random order. That creature gains haste and decayed.

Jealous Packmother —
Creature — Wolf (U)
Permanents can't transform into Humans.
Werewolves that happen into her pack lose months at a time living amongst them.
3/3

Olivia Voldaren Markov
Legendary Creature - Vampire Noble Advisor
Flying, Haste
As long as you control another legendary Vampire, Attacking vampires you control get +1/+0, Deathtouch, and Trample.
"Taking Edgar's name isn't exactly appetizing, but at least I can torment his grandson with it."
[4/4]

Selhof Ship
Artifact — Vehicle
Flash
Crew 2
Disturb
4/4

Nebelgast Crew
Enchantment — Aura
Enchant artifact
Enchanted artifact is a creature in addition to its other types. If it isn't a Vehicle, its base power and toughness are 4/4.
Tap two untapped Spirits you control: Enchanted artifact gains flying until end of turn.

Claw-Torn Thicket
Land (R)
Claw-Torn Thicket enters the battlefield tapped.
Daybound (If a player casts no spells during their own turn, it becomes night next turn.)
: Add or .
///
Howlpack Territory
Land (R)
Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)
: Add .

Next is Theros.

Born of the Gods
Enchantment
Enchant creature
When Born of the Gods enters the battlefield, create a Young Hero Role token attached to enchanted creature.
Heroic — Whenever you cast a spell that targets enchanted creature, you may create a Royal Role token, a Mentor Role token (When enchanted creature attacks, put a +1/+1 counter on another attacking creature with lesser power.), or a Sorcerer Role token attached to enchanted creature.

Journey into Nyx
Sorcery (R)
Target creature you control becomes an Aura Enchantment and gains "Enchanted creature gets +X/+X, where X is this card's power and gains this creature's abilities." Attach it to another creature you control. When it becomes unattached, it becomes an Enchantment Creature.

Let's pretend this works.

Beyond Death —
Instant (U)
Return target creature card from your graveyard to your hand.
Escape—, exile five other cards from your graveyard

Firedrinker Apologist
Creature - Satyr
Haste
: Put a stun counter on ~. It gets +1/+0 until end of turn.
"You might think Xenagos was a little off, but once you've had a few cups of this stuff you'll see what I'm aying. Maybe even literally."
[1/1]

Laureled Quarry

Enchantment Creature -- Beast (C)
Devout — Laureled Quarry enters the battlefield with two +1/+1 counters on it if your devotion to any color is five or greater.
Nylea sees that any beast that puts up a particularly good fight during a hunt is given an honored place in her realm in death.
4/4

Iroas, Victory-Crowned
Legendary Enchantment Creature — God
Indestructible
As long as your devotion to red and white is less than seven, Iroas isn’t a creature.
The first time you cast a spell that targets one or more creatures you control each turn, for each of those creatures, create a Young Hero Role token attached to it.
, Sacrifice an Aura attached to a creature you control: That creature gains menace and indestructible until end of turn.
4/2

Syncretist Sanctum —
Artifact (R)
At the beginning of your upkeep, if your devotion to each colour is the same, draw a card.
At the beginning of your end step, if your devotion to each colour is greater than 2, draw a card.