Eidolon of Philosophy

{6}{U}, Sacrifice Eidolon of Philosophy: Draw three cards.

Rockcaster Platoon

{4}{G}: Rockcaster Platoon deals 2 damage to each creature with flying and each player.

Each player can't cast more than one spell each turn.

Desert of the Mindful enters tapped.
{T}: Add {U}.
Cycling {1}{U} ({1}{U}, Discard this card: Draw a card.)

At the beginning of your upkeep, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

Tap up to two target creatures. Those creatures don't untap during their controller's next untap step.

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.)
Counter target spell unless its controller pays {X}.

Counter target spell unless its controller pays {X}, where X is its mana value.

Enchant creature
You control enchanted creature.

Draw a card.
Flashback {2}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)