Effects that interact with this zone (and not the Command Zone as well, ala Drannith Magistrate) arent exactly commonplace, though they do exist
Obviously, as you can see above, the first of these is the green god, Ojer Kaslem, Deepest Growth
Most of the time on turn 3 youre probably just going to want to play it as a 3-mana 3/3 that enters tapped, but sometimes youre in a spot where you really need to be able to block, and you can play it Disguised when thats the case, and draining 3 life from your opponent is a pretty real effect
That said, it does let Emerald-Steel have options for trading challenges with their characters at a faster pace
Well, at least if you can afford them
7 - Scarlet Spider, Ben Reilly Another Spidey, Ben Reilly can cost as little as two mana with the web-slinging mechanic, which is very nice for a 4/3 with trample