Lore Seeker

Firebolt deals 2 damage to any target.
Flashback {4}{R}

Target player draws two cards.
Flashback—{1}{U}, Pay 3 life.

Target player discards two cards. You gain 3 life for each land card discarded this way.

{1}{G}: Basking Rootwalla gets +2/+2 until end of turn. Activate this ability only once each turn.
Madness {0}

Flying
As long as Wonder is in your graveyard and you control an Island, creatures you control have flying.

{R}, Sacrifice Goblin Legionnaire: It deals 2 damage to any target.
{W}, Sacrifice Goblin Legionnaire: Prevent the next 2 damage that would be dealt to any target this turn.

As Engineered Plague enters the battlefield, choose a creature type.
All creatures of the chosen type get -1/-1.

Haste
When Goblin Ringleader enters the battlefield, reveal the top four cards of your library. Put all Goblin cards revealed this way into your hand and the rest on the bottom of your library in any order.

Target player sacrifices an attacking creature.
Storm

{2}, {T}: Add {B} for each Swamp you control.

Create a 6/6 green Wurm creature token.
Flashback {3}{G}

Counter target spell unless its controller pays {1}.