Flickering Ward, Gryff's Boon, Raffine's Guidance, Sentinel's Eyes Brilliant Halo, Conviction, Skyblade's Boon, Spirit Loop Forced Worship Protection Auras If youre the kind of player who packs a Swiftfoot Boots into all your EDH decks, you know what these are for

#4 Mamoswine ex Pokmon: 23 4 Swinub SV9 44 2 Piloswine SV9 45 3 Mamoswine ex SV9 46 2 Pidgey OBF 162 1 Pidgeotto MEW 17 2 Pidgeot ex OBF 164 2 Nacli PAR 102 1 Naclstack PAR 103 2 Garganacl PAR 104 2 Luxray PAL 71 1 Fezandipiti ex SFA 38 1 Cornerstone Mask Ogerpon ex TWM 112 Trainer: 30 4 Arven OBF 186 2 Iono PAL 185 2 Boss's Orders PAL 172 1 Professor Turo's Scenario PAR 171 4 Rare Candy SVI 191 3 Buddy-Buddy Poffin TEF 144 2 Ultra Ball SVI 196 2 Pokgear 3.0 SVI 186 2 Earthen Vessel PAR 163 1 Counter Catcher PAR 160 1 Super Rod PAL 188 1 Precious Trolley SSP 185 2 Technical Machine: Evolution PAR 178 1 Big Air Balloon MEW 155 1 Rock Chestplate SVI 192 1 Pokmon League Headquarters OBF 192 Energy: 7 6 Fighting Energy SVE 14 1 Reversal Energy PAL 192 Mamoswine looks to be a perfectly adequate new deck coming out in Journey Together
Any instances of the ability already on the stack when you choose to copy a spell will have no effect
In addition, Merens free creature reanimation each turn means you can very easily set up an early Massacre Wurm or loop a Walking Ballista with Mikaeus, the Unhallowed in an instant
While these enter the battlefield (ETB) abilities tend to be very straightforward, there are still a wide array of effects that can be triggered this way
People often put specific decks or sets that are trying to test