So, I haven't found a way to make this work against non-living creatures, but...
1. (20) [mwcard=DNJ04]Graveyard[/mwcard] (6) [mwcard=DNQ10]Meditation Amulet[/mwcard] (2)
2. (12+1) [mwcard=DNC05]Ichthellid[/mwcard] (4) Meditate (7) [mwcard=MW1J20]Sacrificial Altar[/mwcard] (3)
3. (13+1) [mwcard=DNC05]Ichthellid[/mwcard] (5) Meditate (8) Probaby some armor (2)
Your goal here is to flood the opponent with the [mwcard=DNC05]Ichthellids[/mwcard]. They're expensive to get started, which is why we're using Graveyard and Meditation Amulet. But once a Bug lays an egg, you can use something like Drain Soul or Hurl Boulder to kill the creature and get another Bug. Then, once it's near death (it doesn't take much to kill them) you can sacrifice your bug to the Altar to give some other Bug a boost and add some mana to your Graveyard. As long as possible, keep meditating and swarming.
Between your 10 channeling, the Graveyard's 1 channeling and bonus mana when something dies, and meditation, it won't take that long to get into Sardonyx range. Be sure you have spells like Charge ready so the dragon can hit distant targets. People like to run from him.
If the upkeep on the dragon gets to be too much, you can always sacrifice him to the Altar, to give something melee+8 piercing+8. Preferably your Necro armed with [mwcard=MWSTX2FFQ06]Morning Star[/mwcard]. Nothing worse than getting that attack Blocked.