For the purposes of Chalice of the Void, neither activating a ninjutsu ability nor putting a card onto the battlefield is the same as casting a spell (review C.R. 702.48a; compare C.R. 701.2, activate, with C.R. 701.4, cast; see also this thread), so Chalice of the Void's triggered ability won't trigger from either action.
for example
1. opponent has chalice set to 1. Can I ninjutsu a skullsnatcher or not?
2. opponent has chalice set to 2. Can I ninjutsu a skullsnatcher or not?
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Want to play a UW control deck in modern, but don't have jace or snaps?
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Nexus MTG News // Nexus - Magic Art Gallery // MTG Dual Land Color Ratios Analyzer // MTG Card Drawing Odds Calculator
Want to play a UW control deck in modern, but don't have jace or snaps?
Please come visit us at the Emeria Titan control thread