Can you target a creature with shroud using a spell that says choose a creature?

Shroud is a keyword ability defined in CR 702.11b: a permanent or player with shroud cannot be the target of spells or abilities. The critical question is whether 'choose a creature' on a spell counts as targeting — and in almost all cases, it does.

When a spell or ability uses the word 'target' on the card itself, or is written as an instruction to 'choose a creature you control' in a context where that choice is made during the casting/activation process (i.e., on announcement, not on resolution), it is targeting under CR 114.1. Shroud blocks this entirely.

However, if a spell says 'choose a creature' and that choice is made on resolution rather than on announcement, it is not targeting, and shroud does not apply. This is a key distinction. Most spells that say 'target creature' are targeting; some spells that say 'choose a creature' as part of their resolution effect (like some board effects) are not. Always check whether the word 'target' appears in the spell's text.

Concrete example: You cast Pacifism, which says 'Enchant target creature.' Your opponent's Slippery Bogle has shroud. You cannot choose the Bogle as the target for Pacifism — the spell is illegal to cast targeting it, and if shroud were granted in response, Pacifism would be countered for having no legal target (CR 608.2b).

Summary: If the spell uses the word 'target,' shroud stops it. If the choice happens on resolution without the word 'target,' shroud does not interfere. Always read the card carefully for the word 'target.'