(You cannot halve the same damage twice this way.) While you control a Link Monster, monsters your opponent controls cannot target monsters you control for attacks, except this one, also your opponent cannot target monsters you control with card effects, except this one
So I can tell Gogmamon and Baboongamon will end up secondary or excluded due to Vaccine types for one thing to carry all the way to Ultimate from Child
Each "Virtual World Gate" card has two effects: a disruptive effect on the field, and a second supportive effect in the GY that require banishing themselves as cost
Better still, it also gives all instant and sorcery spells in your hand Affinity for creatures, too, making it a highly playable card in Standard, Limited, and Commander.
Which one has you excited the most, and why is it Invasion of IkoriaInvasion of Ikoria
It will quickly get outclassed in most games and be relegated into chump block mode The adventure side here is the kind of thing you probably only use in the later stage of the game when it allows you to reload your hand