Dell Conagher, The Engineer

At the beginning of your upkeep, you may place
1 metal marker on Dell Conagher.
Once Dell Conagher has 5 or more metal markers,
you may remove them from Dell Conagher
and summon 1 Sentry Token Creature.
Once Dell Conagher has 7 or more metal markers,
you may remove them from Dell Conagher
and summon 1 Dispenser Artifact.