These are the best Sacrifice outlets in Magic: The Gathering: 1
Im growing an appreciation for them now and that Rayquaza is one Ive gazed at a few times over the past week
As explained earlier, counterspells are generally classified as aggressive interaction, but given that they are cheap enough to be cast with leftover mana after casting a win condition, and that an opponent's response to your action is basically an instant, counters that can cheaply negate instants can be called aggressive interaction
If your deck and/or sideboard include multiple copies of Built Bear, you can circle different options for each Built Bear as long as the choices for each one are clear and understandable to all players
Thundering Sparkmage Thundering Sparkmage could have some potential if it read X damage to any target. Unfortunately it says X damage to any creature or planeswalker . Build-your-won Flametongue Kavu is always a fine payoff for a strategy, but always begs the question why you wouldn't just play Flametongue Kavu instead
Finally, flickering (exiling and returning to the battlefield) works weirdly for double-faced cards