Floodgate
{3}{U}
Creature -- Wall
0/5
Defender
When ~this~ has flying, sacrifice it.
When ~this~ leaves the battlefield, it deals damage to each nonblue creature without flying equal to half the number of Islands you control, rounded down.
Student of Elements
{1}{U}
Creature -- Human Wizard
1/1
When ~this~ has flying, flip it.
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Tobita, Master of Winds
Legendary Creature -- Human Wizard
3/3
Creatures you control have flying.