Insectile Aberration

Delver of Secrets

At the beginning of your upkeep, look at the top card of your library. You may reveal that card. If an instant or sorcery card is revealed this way, transform Delver of Secrets.

Delver of Secrets // Insectile Aberration

Tolarian Terror

This spell costs {1} less to cast for each instant and sorcery card in your graveyard.
Ward {2} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2}.)

Serpentine Curve

Create a 0/0 green and blue Fractal creature token. Put X +1/+1 counters on it, where X is one plus the total number of instant and sorcery cards you own in exile and in your graveyard.

Counterspell

Essence Capture

Counter target creature spell. Put a +1/+1 counter on up to one target creature you control.

Island

Spell Pierce

Counter target noncreature spell unless its controller pays {2}.

Tempest Djinn

Flying
This creature gets +1/+0 for each basic Island you control.

Thought Scour

Target player mills two cards.
Draw a card.

Accumulated Knowledge

Draw a card, then draw cards equal to the number of cards named Accumulated Knowledge in all graveyards.

Consider

Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)
Draw a card.