The large supply makes the format-defining cards of Standard a bit less of a commodity than something like a critical Modern staple
Thats not too bad though, and Get Lost allows you to hit creatures, enchantments or even planeswalkers with it
Enchantment Enchantment (CTRL to add secondary) Instant Teferi's Protection Until your next turn, your life total can't change and you gain protection from everything
If a source would deal damage to you or a permanent you control, prevent half that damage, rounded up
You might consider throwing in ways to speed things up
On top of that, it punishes aggressive and card-hungry opponents by letting you draw whenever they attack with multiple creatures, draw their second card, or cast their second spell during a turn