For a card chock full of value, he seems to be a perfect fit in Sultai Lord Gerard Fabianos Sultai Control that aims to outgrind opponents in value
The only thing that you can safely trade for in bulk are commons/uncommons for decks (Yanma, Magnemite, Phanpy, etc), or average Trainer cards like Switch, Energy Retrieval, etc
This version of the card is way more objectionable than the others, as it shows the Horned Turtle actually biting someone who is attempting to run away from them
Finally, more protection from Silkguard that, again, buffs our power
At the very worst you always get The Spear of Leonidas for free, wherever it may be, and then you get the promise of extra card draw as your equipped creatures deal combat damage
One mana for three cards is basically what cements this cards dominance