Place Elixir Collector on your side, behind or next to your tower, to generate elixir. In decks with expensive cards like Three Musketeers or Golem it covers the elixir gap. If your opponent spends Miner or a spell on it, you may still come out ahead on elixir.
Tips
Place it behind your tower to protect it from Miner and spells.
Play it after your opponent spends elixir, or you'll face pressure.
It's most valuable in decks with expensive cards.
Strengths
Gives you an elixir lead over time.
Solves the elixir problems of expensive decks.
Weaknesses
Doesn't fight; you're open to pressure the moment you place it.