The Incredible Hulk leaves the battlefield before that ability resolves, and you won't put three +1/+1 counters on him
That said, if you want to go for a knight deck thats very attack-heavy with a focus on playing multicolored knights, this card can give your attacks a huge boost, especially by making your white knights untap so you can protect yourself after attacking
Whether or not thats going to actually be handy in the new Into the Inklands season is yet to be seen
Shard color names White/Blue/Black - Esper Blue/Black/Red - Grixis Black/Red/Green - Jund Red/Green/White - Naya Green/White/Blue - Bant Wedge color names White/Black/Green - Abzan White/Blue/Red - Jeskai White/Black/Red - Mardu Blue/Black/Green - Sultai Blue/Red/Green - Temur Four color combinations The four-color combinations have the least amount of lore behind them compared to all the other color combinations
Each game of Magic felt like a plane, almost, even with the riot of cards on the battlefield from across time and planar space
Even Brainstorm - notoriously strong card - wouldn't become good until fetch lands and shuffle effects would become more prevalent