Lore Seeker

Counter target spell. If that spell is countered this way, put it into its owner's hand instead of into that player's graveyard.
Draw a card.

{T}, Sacrifice Tormod's Crypt: Exile all cards from target player's graveyard.

When Eternal Witness enters the battlefield, you may return target card from your graveyard to your hand.

Target player loses 2 life and you gain 2 life.
Storm

{T}: Add {G}.
{T}: Target 1/1 creature gets +1/+2 until end of turn.

Return target creature card from your graveyard to the battlefield.

Defender
Put a -0/-1 counter on Wall of Roots: Add {G}. Activate this ability only once each turn.

{T}: Add {C}.
{T}: Desert deals 1 damage to target attacking creature. Activate this ability only during the end of combat step.

Draw three cards. Then discard two cards unless you discard an artifact card.

Serrated Arrows enters the battlefield with three arrowhead counters on it.
At the beginning of your upkeep, if there are no arrowhead counters on Serrated Arrows, sacrifice it.
{T}, Remove an arrowhead counter from Serrated Arrows: Put a -1/-1 counter on target creature.

Imprint — When Isochron Scepter enters the battlefield, you may exile an instant card with converted mana cost 2 or less from your hand.
{2}, {T}: You may copy the exiled card. If you do, you may cast the copy without paying its mana cost.

As an additional cost to cast this spell, sacrifice an artifact.
Shrapnel Blast deals 5 damage to any target.