These all give you access to powerful removal, counterspell, and protection, something very much appreciated in a deck like Calvary Charge that wants a lot of creatures on the battlefield on your side and little on your opponents'
Don't forget that becoming the Ring-bearer makes a creature legendary, making this so much easier to use than it first looks
That will draw, discard, and put +1/+1 counters there for each spell discarded
Unlike OCG, the timing of effect activation is not limited immediately after summoning, but is relaxed to the main phase of the turn, increasing the opportunity to use it
Inspect exact cards before deciding whether any submission makes financial sense, and forecast the lot without grading upside
Mew VMAX [C][C] Cross Fusion Strike: Choose 1 of your Benched Fusion Strike Pokmons attacks and use it as this attack