Lonis, Genetics Expert + Krark-Clan Grunt + Irenicus's Vile Duplication

Lonis, Genetics Expert

Krark-Clan Grunt

Irenicus's Vile Duplication

How it works

1. Cast Irenicus's Vile Duplication by paying its mana cost, creating a token copy of Lonis that isn't legendary.
2. Activate Krark-Clan Grunt by sacrificing a Clue.
3. Lonis and the Lonis token's second abilities trigger.
4. Resolve the nontoken Lonis trigger, putting a +1/+1 counter on the token Lonis.
5. The token Lonis's first ability triggers, creating a Clue artifact token.
6. Resolve the token Lonis's trigger from step 2, putting a +1/+1 counter on the nontoken Lonis.
7. The nontoken Lonis's first ability triggers, creating a Clue artifact token.
8. Resolve the Krark-Clan Grunt ability.
9. Repeat from step 2.

This loop transforms a single copy effect into an escalating engine of discovery and growth. By using Irenicus's Vile Duplication to bypass the legend rule and duplicate Lonis, Genetics Expert, you set up a pair of investigators that constantly feed into each other's triggered abilities. Krark-Clan Grunt provides the necessary outlet by sacrificing the Clue tokens generated by this back-and-forth counter placement, which in turn triggers Lonis to distribute more +1/+1 counters to fuel the Grunt's ongoing prowess.