First go around with a Mist Midrange Interrogator build!

Love the value this avatar brings for both aggressive and controlling play styles.

Early Game Focus

Starting Hand will determine early threshold goals but generally will value water threshold priority
Set up artifacts if drawn into or drawn into starting hand
Push for early game board presence with early game control/value minions
Winter Nymph
Coy Nixie
Grim Reaper
Nelly Longarms
Lugbog Cat
Jack the Ripper
Aino
Early game Browse Targets
Aquamarine Core
Silver Bullet/Toolbox
The Green Knight
Jack the Ripper
Aino
Summoning Sphere

Mid Game Focus

Board State and opponents choices on early trades will determine our strategy heading into midgame
In early/mid game we want to leverage Interrogator ability and your early turns determine whether you will push the opponent into a defensive strategy if they take the extra life loss, if they choose to give you card advantage however you will know they are setting up for a play so you can prepare a defensive counter strategy
If the opponent is playing aggro, fall back on the midrange minions or swing tempo with removal spells

Continue to build board control if unhindered with aggressive/sticky minions to get trade value with Interrogator ability
Phase Assassin
Gyre Hippogriffs
Sturmgeist
Ruler of Thul
Failed Mutation
Thing in the Ice
Daperyll Vampires
If behind or fighting or board control use forced movements on creatures or removal spells (Toolbox & Silver Bullet) to swing tempo back to your favor
Abaddon Succubus
Lacuna Entity
Nelly Longarms
Coy Nixie
Magic Removal
Cast into Exile
Lightning Bolt
Grapple Shot
Drown
Tempo Swings!
Browse
Mesmerism
Swap
Browse targets Mid Game/Closing Prep (matchup dependent)
The Green Knight
Ruler of Thul
Sphere of Annihilation
Summoning Sphere
Removal
Cast into Exile
Lightning Bolt
Grapple Shot
Drown

Late Game/Closing Out Focus

Interrogator can close games out very quickly with various set ups but more often than not we are going to be attempting to box the opponent in with smothering waves of damage from unlikely sources
Pushing in with your higher curve minions via site damage trades can push opponent to DD quickly depending on opponents choices
Claim the win with
Ruler of Thul
Summoning Sphere
Sphere of Animosity
Finish the opponent at DD via
Direct Minion strikes
Lightning Bolt
Murder of Crows
Grapple Shot
Counter defensive strategies
Summoning Sphere to get over wall strats
Sphere of Animosity to deny healing and wall off opponent from minion help
Clearing blockers/ threats with Forced movement minions/Tempo swing spells
Lacuna Entity
Abaddon Succubus
Coy Nixie
Nelly Longarms
Swap
Mesmerism

Hope you all enjoy this build as much as I am and would love to hear any thoughts on improvements!

Edit- v1

Cut the creatures down a bit to get to 32 creatures as I felt it needed more control aspects through straight removal

Also depending on local meta Return to Natures can be swapped for Magic Missles if graveyard hate isn't required

Edit v2

Cut River Sites from 5 to 2 to add 3 Thin Ice Sites after online testing

Scour the Mind