That means you get Final Fantasy: Garland at The Chaos Shrine, Final Fantasy VIII: Children of Fate, Final Fantasy IX: The Siege of Alexandria, and Final Fantasy XV: Camp Comrades
Ill confess to having tried to build a Kardur deck myself at one point
When those creatures come back, if any are under your control, they get a couple of counters to boot
For example, if you control The Ozolith ("Whenever a creature you control leaves the battlefield, if it had counters on it, put those counters on The Ozolith.") when Zack Fair's last ability resolves, you'll put the appropriate number of each kind of counter onto both The Ozolith and the target creature.
By the time this card runs out of nodes, you should have all the colors you need