Just like Knight-Errant of Eos and Venerated Loxodon, The Wandering Rescuer is a five-mana threat with Convoke
Bulk: $15/card, 25 card minimum, max declared value of $250, 30 day turnaround Economy: $25/card, no minimum, max declared value of $500, 20 day turnaround Standard: $35/card, no minimum, max declared value of $1,000, 10 day turnaround Express: $70/card, no minimum, max declared value of $10,000, 5 day turnaround WalkThrough: $150/card, no minimum, max declared value of $50,000, 3 day turnaround Unlimited WalkThrough: $150/card + 1% fair market value, no minimum, unlimited max declared value, 3 day turnaround CGC also offers the additional option of getting Sub-Grades where the card is assigned separate grades for centering, corners, edges, and surface in addition to its overall grade
It has several tutorials that will show you how to play in a practical way, each one more complex than the previous one
Overall id say the weak point is the master balls