Bifur, Melodic Rider

Equipping Bifur makes his enter-or-attack ability trigger an additional time; once the enduring story is active, Bifur also doubles his own Dwarf trigger, producing three +1/+1 counter triggers whenever he attacks.

Once you have an enduring story, Bifur doubles Glóin's beginning-of-main-phase trigger, increasing the mana production from two red mana to four.

Once the enduring story is active, Bifur doubles Dáin's enter-the-battlefield trigger, creating and attaching two Axes instead of one. Dáin itself also contributes a legendary permanent and an artifact toward enabling Storied.

Once you have an enduring story, Bifur doubles Dáin's Company's triggered enter ability, letting you look at four cards twice and potentially draw two Dwarf or Equipment cards.

Seek the Heart can tutor Bifur directly, while casting The Arkenstone afterward adds a legendary artifact toward Storied and supplies an anthem and recurring cards for Bifur's late-game Dwarf board.

Once you have an enduring story, Bifur doubles Nori's Dwarf attack trigger, allowing two attacking creatures to gain first strike each combat.

Once you have an enduring story, Bifur doubles Fíli's triggered ability, so Fíli and each later nontoken Dwarf create two 2/2 Dwarf tokens instead of one; Fíli's anthem then enlarges all of them.

Once you have an enduring story, Bifur doubles Balin's triggered abilities. Each Dwarf entry can therefore cycle your hand twice, with each resolution also dealing damage based on the cards discarded.

Once you have an enduring story, Bifur makes Dwalin's Dwarf-sourced enter and attack trigger happen an additional time, placing two hone counters on every Equipment instead of one.

With an enduring story, Bifur doubles Kíli's triggered ability when another Dwarf or Equipment enters, so Bifur's own entry can draw two cards and later qualifying entries can do the same despite Kíli's once-per-turn limit.

The Saga counts toward achieving Bifur's enduring story, and its creature and artifact removal helps preserve the board of artifacts, legendaries, and Sagas needed to reach that threshold.

Thorin's enter trigger doubled means two rounds of free Equipment attaches and two power-based damage hits.

With the story on, the Blacksmith's enter trigger doubles — two free Axes — while its Axe feeds the story count Bifur needs.

The Map is a cheap legendary artifact that advances Bifur's Storied threshold while finding a land to help reach six mana; its later filtering also helps turn excess lands into action.

Thorin is an early legendary permanent that advances the shared Storied plan, and once the enduring story is established, his ward ability protects Bifur and the other Dwarves whose triggers Bifur doubles.

Once Storied is active, Bifur doubles Dori's Dwarf-triggered enters ability, so Dori creates two Treasures instead of one.

With an enduring story, Bifur doubles Stalwart's Dwarf triggered ability, allowing two Equipment to be attached for free and creating a heavily upgraded attacker without paying either equip cost.

Bofur is a cheap legendary permanent that advances Bifur's Storied threshold, while Concerted Care can protect the six-mana Bifur with both hexproof and indestructible before Bofur is cast from exile.

The Shortsword supplies an artifact toward the enduring story and simultaneously creates an equipped Dwarf body, helping Bifur's deck establish both its Storied requirement and the Dwarf board whose triggered abilities it wants to double.

Dáin is a cheap legendary Dwarf that helps establish the enduring story early, and its attack tax protects the board and buys time to cast Bifur and repeatedly attack for doubled Dwarf triggers.

If you already control two qualifying permanents, temporarily making another creature an artifact can supply the third permanent needed to establish the enduring story permanently; the indestructible mode can also protect Bifur in combat or from removal.

The Mattock is an artifact toward Bifur's Storied threshold and can attach to Bifur immediately when it enters, making the key six-mana payoff larger and giving it ward to make removal more difficult.