Awesome Cyber Monday

Whenever you cast an instant or sorcery spell, Kiln Fiend gets +3/+0 until end of turn.

Whenever another creature enters the battlefield, you may put X +1/+1 counters on Hamletback Goliath, where X is that creature's power.

Council's dilemma — When Lieutenants of the Guard enters the battlefield, starting with you, each player votes for strength or numbers. Put a +1/+1...

Each opponent discards two cards.

Melee (Whenever this creature attacks, it gets +1/+1 until end of turn for each opponent you attacked with a creature this combat.) Whenever Custod...

All creatures get -2/-2 until end of turn.

If there are ten or more creature cards total in all graveyards, this spell costs {6} less to cast. Fear (This creature can't be blocked except by ...

Defender Whenever Vertigo Spawn blocks a creature, tap that creature. That creature doesn't untap during its controller's next untap step.

Counter target noncreature spell.

Counter target spell. Draw a card.

Counter target spell. If an artifact or creature spell is countered this way, put that card onto the battlefield under your control instead of into...

Flash (You may cast this spell any time you could cast an instant.) When Deceiver Exarch enters the battlefield, choose one — • Untap target perman...

Flying

Flying You have hexproof. (You can't be the target of spells or abilities your opponents control.)

Create two 1/1 white Soldier creature tokens.

You gain 3 life. Draw a card.

Enchant creature All damage that would be dealt to you is dealt to enchanted creature instead.

Vigilance {3}{W}{W}{W}: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.) As long as Hu...

Destroy target attacking creature.

Flash (You may cast this spell any time you could cast an instant.) Flying When Hollowhenge Spirit enters the battlefield, remove target attacking ...

Put all creatures on the bottom of their owners' libraries.

Hail of Arrows deals X damage divided as you choose among any number of target attacking creatures.

Hidden agenda (Start the game with this conspiracy face down in the command zone and secretly choose a card name. You may turn this conspiracy face...

Flying Guardian of the Gateless can block any number of creatures. Whenever Guardian of the Gateless blocks, it gets +1/+1 until end of turn for ...