Sacrifice after III.) I: Search your library for a Doctor card, reveal it, put it into your hand, then shuffle
There's no limit to how many times an action can be performed unless otherwise specified
Further, the "ten Shocks" baseline (or "seven Lightning Bolts" baseline) also gives us a relationship structure connecting "number of cards" and "winning the game." In some decks, the answer is just "two." These relationships can also change how we think about basic notions of card advantage
Canopy Tactician Canopy Tactician combines the elf boosting ability with a pretty powerful mana ability, improved via untap effects
This is another tutoring mechanic, which makes it unlikely to return since tutoring mechanics can be quite powerful, hard to balance, and make games repetitive