It's going to attack for the first time when you have six mana
Benefactors Draught Untap all creatures Until end of turn, whenever a creature an opponent controls blocks, draw a card Draw a card Momentous Fall As an additional cost to cast this spell, sacrifice a creature You draw cards equal to the sacrificed creatures power, then you gain life equal to its toughness Return of the Wildspeaker Choose one Draw cards equal to the greatest power among non-Human creatures you control Non-Human creatures you control get +3/+3 until end of turn Veil of Summer Draw a card if an opponent has cast a blue or black spell this turn Spells you control cant be countered this turn You and permanents you control gain hexproof from blue and from black until end of turn Budget In regards to budget green card draw spells at instant speed, there are tons of cards that cost 2 mana that will give a creature some sort of boost while also drawing you a card

While this is already an impressive effect in its own right, Liberator can also serve as an offensive threat, as whenever you cast a spell, if the amount of mana spent to cast it was greater than its power, it gains a +1/+1 counter, allowing it to scale in strength as the game progresses
You may put that card on the bottom.) Land Land (CTRL to add secondary) Protection Swiftfoot Boots Equipped creature has hexproof and haste
This also combos with Sanguine Bond, Exquisite Blood, or Vito, Thorn of the Dusk Rose to either deal more damage or gain more life