The concept is pretty good, but I'm not sure I like how from an empty field you can gain a Link and a Pendulum on the field. It sounds pretty instant and easy to plus off of.
Effects that drop cards from the Extra Deck to the GY for a recipe (Odd Eyes Fusion or Odd Eyes Advent) require a card effect in your actual immediate resources to trigger the action (the Spell in case of the examples), a field empty of monsters from your end, a certain amount of monsters or more from the opponent's field, and specific materials.
Plus, the card has its own beater presence. I think it'd work better as such a plus if it was a weaker card in terms of ATK and instead protected itself in some way. And if it didn't immediately revive a monster (which can always be one of its materials).
It IS already a +1 Summon and in the OP's version you can just ladder into any Link 3 and re-do something next turn looking at how it will always only be a -1 for your face-up Extra Deck. It is a little bit too loose on restrictions IMO.
Maybe something along the lines of:
2 Pendulum Monsters
You can also Link Summon it by sending the above face-up cards from your Extra Deck to the GY, while you control a Pendulum Card in a Pendulum Zone. You can only Link Summon "Link Magician" once per turn this way. Once per turn: You can place 1 Pendulum Monster from your Extra Deck face-up on an unoccupied Pendulum Zone you control. If this card in your possession is destroyed by battle or a card effect and sent to the GY: You can target 1 Pendulum Monster in your GY; add it to your hand.
^This stresses the usage of your Extra Deck Pendulums a little more, but it is more useful to work towards the goal of completing the Scales, and then it'd give you a Pendulum from the GY only on destruction, but making sure it works even if its Summon gets negated (which your card already works like that I think, but just a bit of a rewording from my part).