Your search for "Tributary Instructor 64" revealed the following:
Tributary Instructor (LCC) from The Lost Caverns of Ixalan Commander, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Christina Kraus Card Text:Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)Whenever a...
Tributary Instructor - Extended Art (LCC) from The Lost Caverns of Ixalan Commander, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Christina Kraus Card Text:MentorWhenever a creature you control with a +1/+1 counter on it dies, draw a...