Evasion ability

An evasion ability on a creature restricts which creatures can block it. The ultimate example would be "This creature is unblockable", but there are several other evasion abilities, such as:

• Flying (Can only be blocked by other creatures with flying)
• Fear (Can only be blocked by Black/Artifact creatures)
• Horsemanship (Can only be blocked by other creatures with Horsemanship)
• Shadow (Can only block or be blocked by other creatures with Shadow)
• Landwalk (Is completely unblockable if defending player controls a land with this property.)
• Protection (Cannot be blocked by creatures with this quality)
• Specific 'Cannot be blocked by' clauses.