Exile target attacking creature. Then remove it from the game. Then put it into the absolutely-removed-from-the-freaking-game-forever zone.
As long as you're shorter than an opponent, Man of Measure has first strike and gets +0/+1. As long as you're taller than an opponent, Man of Measure gets +1/+0.
Flash Flying When Restoration Angel enters, you may exile target non-Angel creature you control, then return that card to the battlefield under your control.
(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I, II — Search your library for a legendary creature card, reveal it, put it into your hand, then shuffle. III — Creatures you control gain double strike until end of turn. The Ring tempts you.
Flash Flying If an opponent would search a library, that player searches the top four cards of that library instead.
Sejiri Shelter Instant Target creature you control gains protection from the color of your choice until end of turn. Sejiri Glacier Land Sejiri Glacier enters tapped. {T}: Add {W}.
Enchant basic land you control When Ossification enters, exile target creature or planeswalker an opponent controls until Ossification leaves the battlefield.
First strike {T}: Brigid, Hero of Kinsbaile deals 2 damage to each attacking or blocking creature target player controls.
You may reveal this card from your opening hand. If you do, when each opponent casts their first spell of the game, counter that spell unless that player pays {1}. Flying Whenever an opponent casts a spell, counter it unless that player pays {1}.
If Leyline of Sanctity is in your opening hand, you may begin the game with it on the battlefield. You have hexproof. (You can't be the target spells or abilities your opponents control.)
Changeling (This card is every creature type.) X: Until end of turn, creatures you control have base power and toughness X/X and gain all creature types.
Devoid Flying, vigilance When Angelic Aberration enters the battlefield, sacrifice any number of creatures each with base power or toughness 1 or less. Create that many 4/4 colorless Eldrazi Angel creature tokens with flying and vigilance.
Flying When Flickerwisp enters the battlefield, exile another target permanent. Return that card to the battlefield under its owner's control at the beginning of the next end step.
Flying Landfall — Whenever a land you control enters, you may return target nonland permanent card from your graveyard to your hand. If that land is a Plains, you may return that nonland permanent card to the battlefield instead.