Minamoto no Yoshitsune is a premium Legendary Commander whose skills are incredibly difficult to upgrade without spending real money on the character, which is why he is sometimes referred to a Moneymoto.

Great against barbarians on the map, he is a cavalry specialist commander that is worth spending tomes on, even if you don't play to spend money to upgrade his skills.

Minamoto no Yoshitune Skills

Here is a rundown of Minamoto's skills

Kyoachiryu
Active Skill
Rage Requirement: 1000
Deals direct damage (depending on skill level) to the target, and has a 50% chance to deal additional damage (depending on skill level) to the target each second for the next 2 seconds.

Levels
Direct Damage Factor: 600, 800, 1000, 1200, 1400
Additional Damage Factor: 200, 280, 360, 480, 600

Trial in Kurama-dera
Passive Skill
Increases cavalry unit's march speed and attack depending on skill level

Levels
Cavalry March Speed Bonus: 3%, 4.5%, 6%, 8%, 10%
Cavalry Attack Bonus: 10%, 12%, 14%, 16%, 20%

Master of Kendo
Passive Skill
Increases damage dealt to barbarians by troops led by this commander, depending on skill level.

Levels
Bonus damage to Barbarians: 10%, 20%, 30%, 40%, 50%

Warlord
Passive Skill
Troop's normal attacks have a 10% chance to increase damage taken by the target 10% for the next 3 seconds. Effects can only trigger once every 5 seconds.

Levels
Damage taken increased by 10%, 15%, 20%, 25%, 30%

Kyohachiryu Kiwami

Without Expertise:
Deals direct damage (Damage Factor 1400) to the target, and has a 50% chance to deal additional damage (Damage Factor 600) to the target each second for the next 2 seconds

With Expertise:
Deals direct damage (Damage Factor 1400) to the target, and has a 75% chance to deal additional damage (Damage Factor 600) to the target each second for the next 2 seconds