Secret Lair Countdown

Legendary Creature — Beast

Vigilance, deathtouch, haste
Questing Beast can't be blocked by creatures with power 2 or less.
Combat damage that would be dealt by creatures you control can't be prevented.
Whenever Questing Beast deals combat damage to an opponent, it deals that much damage to target planeswalker that player controls.

Questing Beast

Secret Lair Drop

Instant

This spell costs {2} less to cast if it targets a blue spell.
Counter target spell unless its controller pays {3}.

Mystical Dispute

Treasure

Counter target noncreature spell. Its controller creates two Treasure tokens. (They're artifacts with "{T}, Sacrifice this token: Add one mana of any color.")

An Offer You Can't Refuse

Trackhand Trainer

Enchantment

Activated abilities of creatures you control cost {2} less to activate. This effect can't reduce the mana in that cost to less than one mana.

Training Grounds

Thrull

Legendary Creature — Human Wizard

Whenever you cast a creature spell, create X 1/1 black Thrull creature tokens, where X is that spell's mana value.
When you control seven or more Thrulls, sacrifice Endrek Sahr.

Endrek Sahr, Master Breeder

Legendary Creature — Plant Druid

Landfall — Whenever a land you control enters, put a +1/+1 counter on target creature.
{3}{G}{G}: Double the number of +1/+1 counters on each creature you control.