Declare The Thing as an attacker. Its second ability triggers, causing you to pay {R}{G}{W}{U} to double the number of +1/+1 counters on a creature you control.
Activate Resourceful Defense by paying {4}{W}, moving five +1/+1 counters from a creature to Sage of Hours.
Activate Sage of Hours by removing all +1/+1 counters from it, causing you to take an extra turn after this one.
Repeat each turn.

Infinite turns

Lock

The Thing

Resourceful Defense

Sage of Hours

Cast Wurmcalling with buyback by paying {2}{G}{G}, returning it to your hand.
At the beginning of your combat phase, The Thing's first ability triggers, putting four +1/+1 counters on it.
Declare The Thing as an attacker. Its second ability triggers, causing you to pay {R}{G}{W}{U} to double the number of +1/+1 counters on it.
Activate The Thing using Sage of Hours' ability by removing all +1/+1 counters from it, causing you to take an extra turn after this one.
Repeat each turn.

Combos with "The Thing"