Treasure

Orcrist, Goblin-cleaver

Equipped creature gets +2/+2 and has trample.
Whenever equipped creature deals combat damage to a player, choose a creature type. Create a Treasure token for each creature you control of that type.
Equip {3}

Sting, Bilbo's Sword

Flash
When Sting enters, put a hone counter on Sting for each creature target opponent controls. Attach Sting to up to one target creature you control. (Each hone counter on an Equipment grants +1/+0 to equipped creature.)
Equip {3}

Elven Passage

{T}, Pay 1 life, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle. You may behold an Elf. If you do, untap that land. (To behold an Elf, choose an Elf you control or reveal an Elf card from your hand.)

Gleaming Splendor

Whenever an opponent draws their second card each turn, you create a Treasure token.
{2}{W}: Two target players each draw a card.

The Lord of the Eagles

Flash
This spell costs {X} less to cast, where X is the total power of creatures you control with flying.
Flying

Gollum, Riddle Master

As Gollum enters, choose odd or even. (Zero is even.)
Whenever an opponent casts a spell with mana value of the chosen quality, choose one that hasn't been chosen —
• Put a +1/+1 counter on Gollum.
• Each opponent loses 2 life and you gain 2 life.
• Draw a card.

Gandalf, Goblins' Bane

Whenever you cast a noncreature spell, Gandalf gets +1/+1 until end of turn and deals 1 damage to each opponent.

Flameshape

Look at the top two cards of your library and exile them face down. For as long as they remain exiled, you may play them if you control a Wizard.

Gandalf, Goblins' Bane // Flameshape

Thorin, Mountain-king

Trample
When Thorin enters, attach any number of target Equipment you control to target creature you control. When one or more Equipment become attached to that creature this way, that creature deals damage equal to its power to up to one target creature.

Thorin's Last Stand

Choose one —
• Creatures you control get +2/+1 until end of turn.
• Destroy target artifact or enchantment. You gain 2 life.

Bard, King of Dale

Reach, vigilance
If you would draw a card except the first one you draw in each of your draw steps, draw two cards instead.
If one or more tokens would be created under your control, twice that many of those tokens are created instead.

Smaug, Wicked Worm

Flying
When Smaug enters, create X tapped Treasure tokens, where X is the number of artifacts your opponents control.
Whenever you cast a spell, if mana from a Treasure was spent to cast it, you draw a card and lose 1 life.

Thranduil, the Elvenking

Thranduil has all activated abilities of all Elf cards in your graveyard.
Whenever another legendary Elf you control enters, draw two cards, then discard a card.

The Arkenstone

Creatures you control get +1/+1.
At the beginning of your end step, draw a card.

Seek the Heart

Search your library for a legendary creature card, reveal it, put it into your hand, then shuffle. (Then exile this card. You may cast the artifact later from exile.)

The Arkenstone // Seek the Heart

The Lonely Mountain

Dwarf

({T}: Add {R}.)
This land enters tapped unless you control an Equipment.
{4}{R}, {T}: Create a 2/2 red Dwarf creature token. This ability costs {1} less to activate for each Equipment you control. Activate only as a sorcery.

Bilbo's Gambit

Gift a Treasure (You may promise an opponent a gift as you cast this spell. If you do, they create a Treasure token before its other effects. It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")
Return target spell to its owner's hand. If the gift was promised, players can't cast spells this turn.

Fíli the Pathfinder

Storied (If you control three or more artifacts, legendaries, and/or Sagas, you have an enduring story for the rest of the game.)
As long as you have an enduring story, creatures you control get +1/+1.
Whenever Fíli or another nontoken Dwarf you control enters, create a 2/2 red Dwarf creature token.

The Hobbit