Mnemonic Wall

Defender
When Mnemonic Wall enters, you may return target instant or sorcery card from your graveyard to your hand.

Brainstorm

Draw three cards, then put two cards from your hand on top of your library in any order.

Exile two target artifacts, creatures, and/or lands you control, then return those cards to the battlefield under your control.

Lonely Sandbar enters tapped.
{T}: Add {U}.
Cycling {U} ({U}, Discard this card: Draw a card.)

Return target creature to its owner's hand.

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

When Radiant Fountain enters, you gain 2 life.
{T}: Add {C}.

When Archaeomancer enters, return target instant or sorcery card from your graveyard to your hand.

Whenever you draw a card, you may have target player mill a card.

Look at the top three cards of your library, then put them back in any order. You may shuffle.
Draw a card.