Onslaught

({T}: Add {R}.)

({T}: Add {B}.)

Tranquil Thicket enters the battlefield tapped. {T}: Add {G}. Cycling {G} ({G}, Discard this card: Draw a card.)

({T}: Add {W}.)

({T}: Add {U}.)

({T}: Add {U}.)

{T}, Pay 1 life, Sacrifice Bloodstained Mire: Search your library for a Swamp or Mountain card, put it onto the battlefield, then shuffle your libr...

({T}: Add {U}.)

Lonely Sandbar enters the battlefield tapped. {T}: Add {U}. Cycling {U} ({U}, Discard this card: Draw a card.)

({T}: Add {U}.)

({T}: Add {G}.)

{T}: Add {C}. {W}{U}, {T}, Sacrifice a Bird: Draw a card.

{T}: Add {C}. {G}, {T}: Untap target Elf.

({T}: Add {B}.)

{T}, Pay 1 life, Sacrifice Polluted Delta: Search your library for an Island or Swamp card, put it onto the battlefield, then shuffle.

{T}: Add {C}. {1}{R}, {T}: Target Goblin creature gets +2/+0 until end of turn.

({T}: Add {R}.)

({T}: Add {W}.)

({T}: Add {R}.)

({T}: Add {U}.)

({T}: Add {B}.)

Barren Moor enters the battlefield tapped. {T}: Add {B}. Cycling {B} ({B}, Discard this card: Draw a card.)

({T}: Add {G}.)

({T}: Add {B}.)