MTG Grixis Midrange Deck by Cardakeys

First strike When Impetuous Lootmonger enters, discard a card, then heist target opponent's library. Whenever you cast a spell you don't own, create a tapped Treasure token.

Flying Whenever Thieving Aven deals combat damage to a player, heist target opponent's library. Whenever you cast a spell you don't own, put a +1/+1 counter on Thieving Aven.

Menace When this creature enters, other creatures get -2/-2 until end of turn. {1}{B}, Discard this card: Target creature gets -2/-2 until end of turn.

When Grenzo enters and at the beginning of your upkeep, heist target opponent's library. Once each turn, you may pay {0} rather than pay the mana cost for a spell you cast that you don't own with mana value 3 or less.

Flash When Triumphant Getaway enters, heist target opponent's library twice. Whenever you cast a spell you don't own, each opponent loses 2 life and you gain 2 life.

Spree (Choose one or more additional costs.) + {3} — Create a 2/2 white Spirit creature token with flying. + {1} — Counter target spell unless its controller pays {2}.

Choose one — • Heist target opponent's library. • Exile up to three target cards from your opponents' graveyards. You gain 3 life.

Choose one. If you control a nonland permanent you don't own as you cast this spell, you may choose two instead. • Heist target opponent's library. • Target creature gets -5/-5 until end of turn. • Counter target noncreature spell.

Cindercone Smite deals 2 damage to target creature. Then create a Treasure token if you weren't the starting player.

If you aren't the starting player, you may cast Shove Aside as though it had flash. Shove Aside deals 3 damage to target creature or planeswalker.

As an additional cost to cast this spell, you may collect evidence 6. Destroy all creatures. If evidence was collected, exile a card from an opponent's graveyard. Then search its owner's graveyard, hand, and library for any number of cards with that name and exile them. That player shuffles, then draws a card for each card exiled from their hand this way.

({T}: Add {U}.)

({T}: Add {B}.)

({T}: Add {R}.)

This land enters tapped. {T}: Add {U} or {B}. {2}{U}{B}: Until end of turn, this land becomes a 4/4 blue and black Shark creature with deathtouch. It's still a land. Whenever this land attacks, target player mills four cards.

({T}: Add {U} or {B}.) This land enters tapped. When this land enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

This land enters tapped unless you control two or fewer other lands. {T}: Add {U} or {R}.

({T}: Add {U} or {R}.) This land enters tapped. When this land enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

({T}: Add {B} or {R}.) This land enters tapped. When this land enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

This land enters tapped. {T}: Add {B} or {R}. {1}{B}{R}: Until end of turn, this land becomes a 2/3 black and red Insect creature with menace. It's still a land. Whenever this land attacks, you may discard a card. If you do, draw a card.

During your first three turns of the game, Captivating Crossroads enters tapped if you were the starting player. As Captivating Crossroads enters, choose a color. {T}: Add one mana of the chosen color.

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle. Then if you control four or more lands, untap that land.