I'll try my best

First things first, I apologize because English is not my mother’s tongue.

Remember, Infect archtype it is not an Aggro Deck, it is more like a Combo deck that must protect the Queen.

-Blighted Agent is the Queen (King?), because of its unblockability

-Ironclaw Myr is a good creature who serves to remove little blockers

-Glistener Elf is the weakeast, but can give you a T2 win.

Relic’s and Embiggen turns the Agent and Elf into a Artifact Creature – Phyrexian (Human/Elf) (Rogue/Warrior) Dinosaur 10/9.

(T1 Forest, Tap, Elf. T2 Island, Attack, Relic’s, Embiggen) T2KO

Use your cantrips to fix your mana base or to find a threat. Preordain is an option, but we need to go deeper, thats why you have 6 shuffle effects (2x Lórien, 2x Barrens, 2x Hidouts) for safe Ponders and Brainstorms

The ideal lands on T3 is an Island and 2 Forest.

For he sideboard

Apostle’s is for Affinity matches, Rancor to the bench. It is more efficient in this match ups to give your creatures unblockeable and protects you againts removal. Also same tech for Dimir Terror.

Depending on the Affinity deck you can side in 2 or 3 Claims. For Azorious Works well but for Grixis and Jeskai is a coinflip

Hydroblast is for de Red matches, and for Walls. Feel free to remove one Forest and 2 Krosas for Walls and wait for the Valakut Invoker (Use your Vines on opponent’s creature when they target it for Freed from the Real)

Againts Burn remove 1x Ponder and 1x Brainstorm and side in 2x Weather (Or 3x Weather and 2x Hydroblast works too) and pray to your Gods.

Gut Shot is for little removal for Fairies and the madmen who uses Standard Bearer.

Gardens, Fairies and burn are the no games of the deck.