Eagle of the Great Shelf

Equipping the Eagle makes its attack ability trigger twice, effectively giving it +2/+2 for each other creature you control on every attack.

Bard's Company both anthems the Eagle and recruits when it attacks. By resolving the recruit trigger first, a newly created Human token is present when the Eagle's attack trigger resolves, immediately increasing its bonus.

Dáin creates and attaches an Axe, then grants double strike to equipped attackers. Equipping Eagle of the Great Shelf lets its board-scaled attack power deal combat damage twice, turning a wide board into a much faster aerial kill.

Casting the five-mana Eagle places five +1/+1 counters on a creature, while subsequent landfall triggers create Bear tokens that each increase the Eagle's attack bonus. The enchantment supplies both permanent size and the wide board the Eagle rewards.

The Notary Hobbits provide three creatures from one card, immediately adding three bodies to the Eagle's attack bonus and rebuilding the wide board it needs.

Fíli creates a Dwarf token when it enters and can continue producing tokens as nontoken Dwarves enter, rapidly adding bodies to the Eagle's attack bonus; its Storied anthem also increases the Eagle's base stats.

The Garrison contributes itself and potentially a recruited Human token to the Eagle's attack bonus, while both cards turn the same go-wide board into large threats.

A kicked Eagles can create several 4/4 Birds at once, giving Eagle of the Great Shelf a large attack bonus from the expanded creature count and presenting an overwhelming flying attack.

The Boat recruits on attack, adding token bodies that make the Eagle's next swing bigger while both pressure the sky and ground.

At the Door creates several creatures at once, directly increasing the Eagle's attack bonus for each additional body and helping it become a much larger flying threat.

Gaze in Wonder clears multiple blockers for the Eagle's attack, and casting Velvetwing Butterflies afterward adds another creature that increases the Eagle's future attack bonus.

The Shortsword creates a Dwarf token that increases the Eagle's attack bonus, then can be moved onto the Eagle to give the scaling flying attacker an additional +1/+2.

The Queen can repeatedly recruit when opponents cast noncreature spells, building a wider board over time so the Eagle attacks for substantially more damage.

Bard doubles the Human tokens produced by Recruit and other token makers, letting a token-heavy deck supply twice as many creatures for the Eagle's attack bonus.

Patient Instructor supplies a creature and can recruit an additional Human token, efficiently adding two potential bodies to the Eagle's attack bonus.

Long Lake Nuisance can add both itself and a recruited Human token to the battlefield, increasing the Eagle's board-scaled attack while advancing the same WU flying go-wide plan.

Another flier contributing power to the discount while attacking in the air alongside him.

Celebrate the Mountain-king can recruit a Human token while removing a blocker, both increasing the Eagle's attack bonus and making its aerial attack harder to race.