Legendary Land Dark Depths Dark Depths enters with ten ice counters on it
Weatherlight Compleated is hands down one of the best at dealing with those restrictions in its deck by synergizing extremely well with the cheap creature/ token generating options, having built in evasion, and a built in draw effect which is rather hard to find in colorless
Gavin, the lead set designer, noticed that my White Auracite design from the Commander set fulfilled our mechanical needs and had a fairly high-profile concept, so we swiped it (and got an extra mana added to its cost somewhere along the way)
I dont know of many cards that can punish greedy deckbuilding this cleanly
Since you can tap it the turn you play it, it only slows you down one mana the turn you cast it
If you want to get more aggressive with your gates, you have a few options