The Sixth Doctor + Romana II + Gideon, Martial Paragon

Prerequisites

• You control a mana-producing creature.
• You have not copied a spell using The Sixth Doctor this turn.

Steps

1. 1Cast Gideon by paying .
2. 2The Sixth Doctor triggers, copying the Gideon spell, with the copy being nonlegendary.
3. 3Resolve both Gideon spells.
4. 4Activate a mana-producing creature by tapping it, adding at least .
5. 5Activate Romana II by paying and tapping it, creating a copy of the Gideon token.
6. 6Activate a Gideon token's first loyalty ability by putting a loyalty counter on it, untapping all creatures you control and giving them +1/+1 until end of turn.
7. 7Repeat from step 4.

Effects

• Infinite mana creatures you control can produce
• Infinite untap of creatures you control
• Infinitely large creatures you control until end of turn