Legendary Creature — Time Lord Doctor
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Paradox — Whenever you cast a spell from anywhere other than your hand, put a +1/+1 counter on target creature.
Team TARDIS — At the beginning of your end step, untap each creature you control with a counter on it.
The Thirteenth Doctor's last ability untaps creatures you control with any kind of counter on them, not just creatures you control with +1/+1 counters on them.