the brothers war mtg card Magic: Gathering tech war machines with ancient magic MTG The Brothers' War Commander:

For example, if a Lakeside Shack and a Breeding Pool you control are entering at the same time (perhaps because of the effect of a spell like Scapeshift), your life total is 14, and your opponent's life total is 20, the Lakeside Shack will enter tapped whether or not you choose to pay life as Breeding Pool enters

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Alternatively, you can always ask friends for help

Look for cards that can repeatedly untap themselves and/or sacrifice things for free like Blasting Station and Ashnod's Altar to establish combos, since free or close to free is important for many loops