Awesome Monday

{T}: Add {W} or {U}. {W}{U}: Azorius Keyrune becomes a 2/2 white and blue Bird artifact creature with flying until end of turn.

Equipped creature gets +1/+0 for each of its colors. Equip {1}

{T}: Target player mills a card. (They put the top card of their library into their graveyard.) {5}, {T}, Sacrifice Codex Shredder: Return target c...

{T}: Add {B} or {G}. {B}{G}: Golgari Keyrune becomes a 2/2 black and green Insect artifact creature with deathtouch until end of turn.

Enchant nonland permanent At the beginning of the upkeep of enchanted permanent's controller, that player sacrifices it unless they pay {X}, where...

{T}: Add {U} or {R}. {U}{R}: Until end of turn, Izzet Keyrune becomes a 2/1 blue and red Elemental artifact creature. Whenever Izzet Keyrune deals ...

{T}: Add {B} or {R}. {B}{R}: Rakdos Keyrune becomes a 3/1 black and red Devil artifact creature with first strike until end of turn.

{T}: Add {G} or {W}. {G}{W}: Selesnya Keyrune becomes a 3/3 green and white Wolf artifact creature until end of turn.

Whenever Street Sweeper attacks, destroy all Auras attached to target land.

As Tablet of the Guilds enters the battlefield, choose two colors. Whenever you cast a spell, if it's at least one of the chosen colors, you gain ...

Azorius Guildgate enters the battlefield tapped. {T}: Add {W} or {U}.

Golgari Guildgate enters the battlefield tapped. {T}: Add {B} or {G}.

Creatures can't attack you or planeswalkers you control unless their controller pays {X} for each of those creatures, where X is the number of ench...

Izzet Guildgate enters the battlefield tapped. {T}: Add {U} or {R}.

Rakdos Guildgate enters the battlefield tapped. {T}: Add {B} or {R}.

{T}: Add {C}. {4}, {T}: Target creature can't be blocked this turn.

Selesnya Guildgate enters the battlefield tapped. {T}: Add {G} or {W}.

Flying

Transguild Promenade enters the battlefield tapped. When Transguild Promenade enters the battlefield, sacrifice it unless you pay {1}. {T}: Add one...

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)