FE: Engage Wave 3 DLC Emblems

Chrom & Robin
Stats (Lv20 Bond): +3 Str, +5 Dex, +4 Spd
Sync Skill #1 Surprise Attack: If unit initiates combat from a terrain that provides Avo bonus, foe cannot counterattack. (3000 SP)
Sync Skill #2 Rally Spectrum (+): Use to grant allies within 2 spaces +2 (+3) to all seven basic stats for 1 turn. (1500 SP -> 2000 SP)
Sync Skill #3 Brute Force: While making a physical attack, critical hits deal increased damage. (1500 SP)
Sync Skill #4 Charm: If unit's attack triggers a chain attack, increases chain attack accuracy to 90%. (800 SP)

Engage Skill #1 Other Half: When unit initiates combat, Robin chain attacks. Grants Mag+10 while engaged.
Engage Skill #2 Giga Levin Sword: Use to attack with a magic sword. Magic attack that uses physical attack power. Swords only.

Inheritable:
Spd/Dex +1/2/3/4/5
Sword Guard: If foe is equipped with a Sword take 1/2/3/4/5 less damage during combat.

Giga Levin Sword+ (Link Move with Lucina): Adjacent allies participate in chain attack.

Weapons:
Levin Sword: 10 Mt, 80 Hit, 8 Wt, 1-2 Range.
Thoron: 14 Mt, 65 Hit, 7 Wt, 1-2 Range.
Falchion: 13 Mt, 80 Hit, 10 Crit, 12 Wt, Effective against Dragons.

Type bonuses:
Dragon
Other Half: Robin chain attacks 2 times.
Giga Levin Sword: Deals extra damage = half of Str.

Backup
Other Half: Guaranteed hit with chain attack.

Covert
Other Half: Grants Mov+1 while engaged.

Flying
Giga Levin Sword: Deals extra damage = Bld.

Mystical
Giga Levin Sword: Deals extra damage = half of Mag.

Cavalry, Armored & Qi Adept - Nothing

Weapon Engraving
+1 Mt, -1 Wt, +20 Avo, + 20 Dodge
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Veronica
Stats (Lv20 Bond): +5 Mag, +4 Res, +6 Lck
Sync Skill #1 Reprisal(+): If unit's HP is not full, adds 30% (50%) of lost HP to Atk. (5000 SP -> 6000 SP)
Sync Skill #2 Book of Worlds: Book of Worlds advances 1 stage (to max 5) for each consecutive round that unit uses Wait. Reverts to base stage if unit triggers the effect. (300 SP)
Sync Skill #3 Level Boost: When unit defeats a foe of a higher level, grants Lvl+1 until the end of battle. (Max +3) (300 SP)
Sync Skill #4: SP Conversion: Grants +20 SP for each defeated foe. Triggers even without a ring or bracelet equipped. (300 SP)

Engage Skill #1 Contract: Use to grant another action to adjacent ally who has already acted. (Ally cannot move.)
Engage Skill #2 Summon Hero: Use to summon a random unit.

Inheritable:
Mag/Dex +1/2/3/4/5
Knife Guard: If foe is equipped with a Knife take 1/2/3/4/5 less damage during combat

Hliðskjálf: 13 Mt, 70 Hit, 7 Wt, 1-2 Range, If unit initiates combat, foe cannot counterattack.
Fortify+ (Staff): 10 Pwr, 1-7 Range. Heals HP and status effects for all allies within a 7-space radius.
Élivágar: 18 Mt, 85 Hit, 10 Wt, 1-2 Range, Nullifies basic stats bonuses on target for 1 turn after combat.

Type Bonuses:
Dragon
Contract: Grants Str/Mag/Def/Res+2 to ally during action.
Summon Hero: Summons a powerful unit.

Backup
Contract: Unit participates in chain attack during ally action.
Summon Hero: Summoned unit has the "Dual Strike" skill.
Note - Dual Strike: "Unit participates in chain attack as if it were a backup unit."

Covert
Contract: Grants Hit/Avo+30 to ally during action.

Cavalry
Summon Hero: Summoned unit gets Mov+1.

Qi Adept, Mystical, Flying, and Armored - Nothing

Weapon Engraving:
+1 Mt, -20 Hit, -20 Crit, -2 Wt, +20 Avo, +20 Dodge
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Notes on Summon Hero:
It's basically the FEH gacha lol, you can roll generic units that are 4 star or Emblems that are 5 star units.
Generic units mantain their class skill if they're promoted (i.e Royal Knight fabrication has the Reforge skill.)