({2} magic symbol) ({GW} magic symbol) ({GW} magic symbol) at most available.
Steps
Activate
Woodland Weavemaster by tapping it, adding an amount of ({GW} magic symbol) equal to its power that can only be spent to activate abilities of Elves or to cast Elf spells.
Woodland Weavemaster and giving it +3/+3 until end of turn.
Repeat, alternating between adding ({G} magic symbol) and ({W} magic symbol) each loop as needed.
Notes
The mana prerequisite can be reduced by up to ({2} magic symbol) ({GW} magic symbol) if
Woodland Weavemaster starts the combo with greater power. As the combo makes more mana each loop, the excess mana can then be used to increase the power and toughness of other creatures as desired.
Results
Infinite colored mana that can only be spent to activate abilities of certain creatures.
Infinite colored mana that can only be spent to cast spells of a certain creature type.
Infinitely large creatures you control until end of turn.
Bracket Tag
This combo has been estimated to be Ruthless (Bracket 4+).