Cards equivalent to Silundi Vision (instant-speed protection/countermagic with modal DFC land) in blue are:
1. Jwari Disruption (counter unless pay 1, DFC land)
2. Glasspool Mimic (not a counterspell, but a blue modal DFC land spells card)
3. Sea Gate Restoration (draw, but high mana cost, blue DFC land)
Reason: Only ZNR and related sets have blue modal DFCs; Jwari Disruption is the closest in color and play pattern.