Awesome Cyber Monday

If Leyline of Singularity is in your opening hand, you may begin the game with it on the battlefield. All nonland permanents are legendary.

Enchant creature Creatures you control that are enchanted get +1/+1 and can't be blocked except by creatures with defender.

When Hatching Plans is put into a graveyard from the battlefield, draw three cards.

Replicate {U} (When you cast this spell, copy it for each time you paid its replicate cost. You may choose new targets for the copies.) Tap target ...

Counter target nonblue spell.

{U}, Sacrifice a creature: Discard a card, then draw a card.

When Crystal Seer enters the battlefield, look at the top four cards of your library, then put them back in any order. {4}{U}: Return Crystal Seer...

Whenever Aetherplasm blocks a creature, you may return Aetherplasm to its owner's hand. If you do, you may put a creature card from your hand onto ...

Prevent the next 3 damage that would be dealt to any target this turn. Draw a card.

Untap all creatures you control. Draw a card.

Flying Haunt (When this creature dies, exile it haunting target creature.) When Belfry Spirit enters the battlefield or the creature it haunts dies...

Create X 1/1 white Pegasus creature tokens with flying, where X is your life total.

Whenever an opponent casts a spell, that player sacrifices a permanent unless they pay {1}.

Skyrider Trainee has flying as long as it's enchanted.

({T}: Add {R} or {G}.) As Stomping Ground enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

({T}: Add {U} or {R}.) As Steam Vents enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

{T}: Add {C}. {R}{G}, {T}: Target creature gets +1/+1 and gains trample until end of turn.

{T}: Add {C}. {3}{W}{B}, {T}: Target player loses 1 life and you gain 1 life.

Orzhov Basilica enters the battlefield tapped. When Orzhov Basilica enters the battlefield, return a land you control to its owner's hand. {T}: A...

{T}: Add {C}. {2}{U}{R}, {T}: Exile the top card of your library. Until your next turn, you may cast it if it's an instant or sorcery spell.

Enchant creature Enchanted creature has "{T}: This creature deals damage equal to its power to target attacking or blocking creature."

Izzet Boilerworks enters the battlefield tapped. When Izzet Boilerworks enters the battlefield, return a land you control to its owner's hand. {T...

Gruul Turf enters the battlefield tapped. When Gruul Turf enters the battlefield, return a land you control to its owner's hand. {T}: Add {R}{G}.

({T}: Add {W} or {B}.) As Godless Shrine enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.