Thousand Dragon

Fusion — Time Wizard, Babby Dragon. (As an
additional cost to cast this spell, sacrifice and/or discard
the specified creatures.)

Cumulative Upkeep {1}

Thousand Dragon gains +1/+1 for each age counter on it.

With 2 age counters, it gains flying.

With 5 age counters, it gains hexproof and indestructible.